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Physics

  • 161 videos
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Projectile motion, mechanics and electricity and magnetism. Solid understanding of algebra and a basic understanding of trigonometry necessary.

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    Introduction to Vectors and Scalars

    by khanacademy 479,865 views

    Learn more: http://www.khanacademy.org/video?v=ihNZlp7iUHE
    Distance, displacement, speed and velocity. Difference between vectors and scalars

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    Calculating Average Velocity or Speed

    by khanacademy 281,330 views

    Learn more: http://www.khanacademy.org/video?v=oRKxmXwLvUU
    Example of calculating speed and velocity

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    Solving for Time

    by khanacademy 163,966 views

    Learn more: http://www.khanacademy.org/video?v=awzOvyMKeMA
    Simple example of solving for time given distance and rate

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    Displacement from Time and Velocity Example

    by khanacademy 141,668 views

    Learn more: http://www.khanacademy.org/video?v=lQ-dvt3V4yQ
    Worked example of calculating displacement from time and velocity

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    Acceleration

    by khanacademy 198,135 views

    Learn more: http://www.khanacademy.org/video?v=FOkQszg1-j8
    Calculating the acceleration of a Porshe

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    Newton's First Law of Motion

    by khanacademy 247,130 views

    Learn more: http://www.khanacademy.org/video?v=CQYELiTtUs8
    Newton's First Law (Galileo's Law of Inertia).

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    Newton's Second Law of Motion

    by khanacademy 189,200 views

    Learn more: http://www.khanacademy.org/video?v=ou9YMWlJgkE
    Newton's Second Law of Motion: F=ma

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    Newton's Third Law of Motion

    by khanacademy 150,579 views

    Learn more: http://www.khanacademy.org/video?v=By-ggTfeuJU
    Every action has an equal and opposite reaction

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    Airbus A380 Take-off Time

    by khanacademy 104,624 views

    Learn more: http://www.khanacademy.org/video?v=p4DTormtEG0
    Figuring how long it takes an a380 to take off given a constant acceleration

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    Airbus A380 Take-off Distance

    by khanacademy 68,891 views

    Learn more: http://www.khanacademy.org/video?v=fQt69_Q2CTw
    How long of a runway does as a380 need

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    Why Distance is Area under Velocity-Time Line

    by khanacademy 92,990 views

    Learn more: http://www.khanacademy.org/video?v=d-_eqgj5-K8
    Understanding why distance is area under velocity-time line

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    Average Velocity for Constant Acceleration

    by khanacademy 101,566 views

    Learn more: http://www.khanacademy.org/video?v=MAS6mBRZZXA
    Calculating average velocity when acceleration is constant

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    Acceleration of Aircraft Carrier Takeoff

    by khanacademy 58,430 views

    Learn more: http://www.khanacademy.org/video?v=VYgSXBjEA8I
    Using what we know about takeoff velocity and runway length to determine acceleration

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    Race Cars with Constant Speed Around Curve

    by khanacademy 56,194 views

    Learn more: http://www.khanacademy.org/video?v=ITA1rW5UraU
    When acceleration could involve a change in direction and not speed

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    Introduction to Gravity

    by khanacademy 120,075 views

    Learn more: http://www.khanacademy.org/video?v=Xcel427Ezl0
    Basics of gravity and the Law of Universal Gravitation

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    Mass and Weight Clarification

    by khanacademy 70,049 views

    Learn more: http://www.khanacademy.org/video?v=IuBoeDihLUc
    Difference between mass and weight

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    Gravity for Astronauts in Orbit

    by khanacademy 59,463 views

    Learn more: http://www.khanacademy.org/video?v=oIZV-ixRTcY
    Why do astronauts appear weightless despite being near the Earth?

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    Would a Brick or Feather Fall Faster

    by khanacademy 62,097 views

    Learn more: http://www.khanacademy.org/video?v=36Rym2q4H94
    What would fall faster on the moon?

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    Deriving Displacement as a Function of Time, Acceleration and Initial Velocity

    by khanacademy 69,513 views

    Learn more: http://www.khanacademy.org/video?v=wlB0x9W-qBU
    Deriving displacement as a function of time, constant acceleration and initial velocity

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    Plotting Projectile Displacement, Acceleration, and Velocity

    by khanacademy 66,587 views

    Learn more: http://www.khanacademy.org/video?v=T0zpF_j7Mvo
    Plotting projectile displacement, acceleration, and velocity as a function to change in time

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    Projectile Height Given Time

    by khanacademy 52,698 views

    Learn more: http://www.khanacademy.org/video?v=IYS4Bd9F3LA
    Figuring out how high a ball gets given how long it spends in the air

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    Deriving Max Projectile Displacement Given Time

    by khanacademy 33,563 views

    Learn more: http://www.khanacademy.org/video?v=P7LKEkcNibo
    Deriving a formula for maximum projectile displacement as a function of elapsed time

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    Impact Velocity From Given Height

    by khanacademy 36,634 views

    Learn more: http://www.khanacademy.org/video?v=2ZgBJxT9pbU
    Determining how fast something will be traveling upon impact when it is released from a given height

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    Visualizing Vectors in 2 Dimensions

    by khanacademy 69,472 views

    Learn more: http://www.khanacademy.org/video?v=xp6ibuI8UuQ
    Visualizing, adding and breaking down vectors in 2 dimensions

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    Projectile at an Angle

    by khanacademy 80,163 views

    Learn more: http://www.khanacademy.org/video?v=ZZ39o1rAZWY
    Figuring out the horizontal displacement for a projectile launched at an angle

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    Different Way to Determine Time in Air

    by khanacademy 38,196 views

    Learn more: http://www.khanacademy.org/video?v=_NWc3C3cTNA
    Another way to determine time in the air given an initial vertical velocity

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    Launching and Landing on Different Elevations

    by khanacademy 36,878 views

    Learn more: http://www.khanacademy.org/video?v=a5QnXi_lZII
    More complicated example involving launching and landing at different elevations

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    Total Displacement for Projectile

    by khanacademy 33,403 views

    Learn more: http://www.khanacademy.org/video?v=UXORCpvKYiI
    Reconstructing the total displacement vector for a projectile

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    Total Final Velocity for Projectile

    by khanacademy 26,537 views

    Learn more: http://www.khanacademy.org/video?v=sTp4cI9VyCU
    Calculating the total final velocity for a projectile landing at a different altitude (mistake near end: I write 29.03 when it should be 26.03 m/s and the final total magnitude should be 26.55 m/s 78.7 degrees below horizontal

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    Correction to Total Final Velocity for Projectile

    by khanacademy 15,074 views

    Learn more: http://www.khanacademy.org/video?v=DNoDJlB0ygU
    Correction to "Total Final Velocity for Projectile" Video

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    Projectile on an Incline

    by khanacademy 29,920 views

    Learn more: http://www.khanacademy.org/video?v=jNESnky3RVg
    Challenging problem of a projectile on an inclined plane

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    Unit Vectors and Engineering Notation

    by khanacademy 28,110 views

    Learn more: http://www.khanacademy.org/video?v=2QjdcVTgTTA
    Using unit vectors to represent the components of a vector

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    Clearing the Green Monster at Fenway

    by khanacademy 36,067 views

    Learn more: http://www.khanacademy.org/video?v=2Epyz-OFRn8
    Setting up the problem to determine the minimum velocity to hit a ball with to clear the Green Monster

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    Green Monster at Fenway Part 2

    by khanacademy 16,937 views

    Learn more: http://www.khanacademy.org/video?v=3nwdtdPAjnY
    Solving the problem to determine the minimum velocity to hit a ball with to clear the Green Monster

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    Optimal angle for a projectile part 1

    by khanacademy 36,471 views

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    Optimal angle for a projectile part 2 - Hangtime

    by khanacademy 26,194 views

    Learn more: http://www.khanacademy.org/video?v=XtAB9GOfLiM
    Optimal angle for a projectile part 2 - Hangtime

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    Optimal angle for a projectile part 3 - Horizontal distance as a function of angle (and speed)

    by khanacademy 24,240 views

    Learn more: http://www.khanacademy.org/video?v=-h_x8TwC1ik
    Horizontal distance as a function of angle (and speed)

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    Optimal angle for a projectile part 4 Finding the optimal angle and distance with a bit of calculus

    by khanacademy 24,265 views

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    Normal Force and Contact Force

    by khanacademy 63,067 views

    Learn more: http://www.khanacademy.org/video?v=1WOrgrIcQZU
    The force that keeps a block of ice from falling towards the center of the earth

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    Normal Force in an Elevator

    by khanacademy 59,182 views

    Learn more: http://www.khanacademy.org/video?v=hoRsHNSrMpc
    How the normal force changes when an elevator accelerates

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    Inclined Plane Force Components

    by khanacademy 115,389 views

    Learn more: http://www.khanacademy.org/video?v=TC23wD34C7k
    Figuring out the components of the force due to gravity that are parallel and perpendicular to the surface of an inclined plane

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    Ice Accelerating Down an Incline

    by khanacademy 57,942 views

    Learn more: http://www.khanacademy.org/video?v=Mz2nDXElcoM
    Figuring out the acceleration of ice down a plane made of ice

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    Force of Friction Keeping the Block Stationary

    by khanacademy 77,488 views

    Learn more: http://www.khanacademy.org/video?v=v8ODIMqbQ44
    Block of wood kept stationary by the force of friction (Correction made in next video)

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    Correction to Force of Friction Keeping the Block Stationary

    by khanacademy 32,801 views

    Learn more: http://www.khanacademy.org/video?v=BukTc4q9BMc
    Correction to Force of Friction Keeping the Block Stationary

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    Force of Friction Keeping Velocity Constant

    by khanacademy 49,955 views

    Learn more: http://www.khanacademy.org/video?v=iA7Thhnzc64
    Calculating the coefficient of kinetic friction (correction made in next video)

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    Intuition on Static and Kinetic Friction Comparisons

    by khanacademy 41,168 views

    Learn more: http://www.khanacademy.org/video?v=J9BWNiOSGlc
    Why static friction is harder to overcome than kinetic friction

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    Static and Kinetic Friction Example

    by khanacademy 84,775 views

    Learn more: http://www.khanacademy.org/video?v=ZA_D4O6l1lo
    Thinking about the coefficients of static and kinetic friction

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    Introduction to Tension

    by khanacademy 218,730 views

    Learn more: http://www.khanacademy.org/video?v=_UrfHFEBIpU
    An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them.

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    Tension (part 2)

    by khanacademy 131,938 views

    Learn more: http://www.khanacademy.org/video?v=zwDJ1wVr7Is
    A slightly more difficult tension problem.

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    Tension in an accelerating system and pie in the face

    by khanacademy 86,854 views

    Learn more: http://www.khanacademy.org/video?v=52wxpYnS64U
    The second part to the complicated problem. We figure out the tension in the wire connecting the two masses. Then we figure our how much we need to accelerate a pie for it to safely reach a man's face.

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    [Private Video]

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    [Private Video]

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    Introduction to Momentum

    by khanacademy 250,172 views

    Learn more: http://www.khanacademy.org/video?v=XFhntPxow0U
    What momentum is. A simple problem involving momentum.

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    Momentum: Ice skater throws a ball

    by khanacademy 126,115 views

    Learn more: http://www.khanacademy.org/video?v=vPkkCOlGND4
    A simple conservation of momentum problem involving an ice skater and a ball

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    2-dimensional momentum problem

    by khanacademy 127,236 views

    Learn more: http://www.khanacademy.org/video?v=CFygKiTB-4A
    An example of conservation of momentum in two dimensions.

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    2-dimensional momentum problem (part 2)

    by khanacademy 64,486 views

    Learn more: http://www.khanacademy.org/video?v=leudxqivIJI
    We finish the 2-dimensional momentum problem

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    Introduction to work and energy

    by khanacademy 296,597 views

    Learn more: http://www.khanacademy.org/video?v=2WS1sG9fhOk
    Introduction to work and energy

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    Work and Energy (part 2)

    by khanacademy 185,009 views

    Learn more: http://www.khanacademy.org/video?v=3mier94pbnU
    More on work. Introduction to Kinetic and Potential Energies.

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    Conservation of Energy

    by khanacademy 205,791 views

    Learn more: http://www.khanacademy.org/video?v=kw_4Loo1HR4
    Using the law of conservation of energy to see how potential energy is converted into kinetic energy

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    Work/Energy problem with Friction

    by khanacademy 146,408 views

    Learn more: http://www.khanacademy.org/video?v=YvacYWgygaA
    A conservation of energy problem where all of the energy is not conserved.

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    Introduction to mechanical advantage

    by khanacademy 86,619 views

    Learn more: http://www.khanacademy.org/video?v=pfzJ-z5Ij48
    Introduction to simple machines, mechanical advantage and moments.

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    Mechanical Advantage (part 2)

    by khanacademy 46,256 views

    Learn more: http://www.khanacademy.org/video?v=DiBXxWBrV24
    More on mechanical advantage, levers and moments.

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    Mechanical Advantage (part 3)

    by khanacademy 149,933 views

    Learn more: http://www.khanacademy.org/video?v=vSsK7Rfa3yA
    Introduction to pulleys and wedges

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    Center of Mass

    by khanacademy 168,598 views

    Learn more: http://www.khanacademy.org/video?v=VrflZifKIuw
    Introduction to the center of mass

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    Introduction to Torque

    by khanacademy 247,384 views

    Learn more: http://www.khanacademy.org/video?v=QhuJn8YBtmg
    An introduction to torque

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    Moments

    by khanacademy 187,456 views

    Learn more: http://www.khanacademy.org/video?v=ESusD8HRLBI
    Introduction to moments

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    Moments (part 2)

    by khanacademy 83,292 views

    Learn more: http://www.khanacademy.org/video?v=peXbz0frV74
    2 more moment problems.

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    Unit Vector Notation

    by khanacademy 102,275 views

    Learn more: http://www.khanacademy.org/video?v=FaF3v-ezbSk
    Expressing a vector as the scaled sum of unit vectors

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    Unit Vector Notation (part 2)

    by khanacademy 39,280 views

    Learn more: http://www.khanacademy.org/video?v=595Tiga1gIg
    More on unit vector notation. Showing that adding the x and y components of two vectors is equivalent to adding the vectors visually using the head-to-tail method

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    [Private Video]

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    [Private Video]

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    Projectile Motion with Ordered Set Notation

    by khanacademy 18,255 views

    Learn more: http://www.khanacademy.org/video?v=jl_gQ-eL3xo
    Solving the second part to the projectile motion problem (with wind gust) using ordered set vector notation

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    Centripetal Force and Acceleration Intuition

    by khanacademy 70,086 views

    Learn more: http://www.khanacademy.org/video?v=vZOk8NnjILg
    The direction of the force in cases of circular motion at constant speeds

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    Visual Understanding of Centripetal Acceleration Formula

    by khanacademy 42,433 views

    Learn more: http://www.khanacademy.org/video?v=NH1_sO8QY3o
    Visual understanding of how centripetal acceleration relates to velocity and radius

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    Relationship between angular velocity and speed

    by khanacademy 114,158 views

    Learn more: http://www.khanacademy.org/video?v=zAx61CO5mDw
    How angular velocity relates to speed

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    Calculus proof of centripetal acceleration formula

    by khanacademy 22,761 views

    Learn more: http://www.khanacademy.org/video?v=XjCEumlJBno
    Proving that a = v^2/r

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    Loop De Loop Question

    by khanacademy 29,139 views

    Learn more: http://www.khanacademy.org/video?v=wjZb3zPuoeA
    Asks students to find the minimum speed necessary to complete the loop de loop

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    Loop De Loop Answer part 1

    by khanacademy 26,126 views

    Learn more: http://www.khanacademy.org/video?v=4SQDybFjhRE
    Figuring out the minimum speed at the top of the loop de loop to stay on the track

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    Loop De Loop Answer part 2

    by khanacademy 17,570 views

    Learn more: http://www.khanacademy.org/video?v=zcnnZz2pCSg
    Figuring out the car's average speed while completing the loop de loop

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    Acceleration Due to Gravity at the Space Station

    by khanacademy 21,400 views

    Learn more: http://www.khanacademy.org/video?v=R5CRZONOHCU
    What is the acceleration due to gravity at the space station

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    Space Station Speed in Orbit

    by khanacademy 19,483 views

    Learn more: http://www.khanacademy.org/video?v=9BNkmfHYYYI
    Speed necessary for the space station to stay in orbit

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    Conservation of angular momemtum

    by khanacademy 104,019 views

    Learn more: http://www.khanacademy.org/video?v=s_R8d3isJDA
    Angular momentum is constant when there is no net torque.

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    Introduction to Newton's Law of Gravitation

    by khanacademy 124,650 views

    Learn more: http://www.khanacademy.org/video?v=391txUI76gM
    A little bit on gravity

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    Gravitation (part 2)

    by khanacademy 65,831 views

    Learn more: http://www.khanacademy.org/video?v=8i0j3j16yFk
    A little bit more on gravity

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    Intro to springs and Hooke's Law

    by khanacademy 134,584 views

    Learn more: http://www.khanacademy.org/video?v=ZzwuHS9ldbY
    Introduction to Hooke's Law

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    Potential energy stored in a spring

    by khanacademy 90,099 views

    Learn more: http://www.khanacademy.org/video?v=eVl5zs6Lqy0
    Work needed to compress a spring is the same thing as the potential energy stored in the compressed spring.

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    Spring potential energy example (mistake in math)

    by khanacademy 48,576 views

    Learn more: http://www.khanacademy.org/video?v=P3QV9ktuYlQ
    A spring, a frozen loop-d-loop and more! (See if you can find the mistake I made and get the right answer!)

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    Introduction to Harmonic Motion

    by khanacademy 153,687 views

    Learn more: http://www.khanacademy.org/video?v=Nk2q-_jkJVs
    Intuition behind the motion of a mass on a spring (some calculus near the end).

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    Harmonic Motion Part 2 (calculus)

    by khanacademy 90,762 views

    Learn more: http://www.khanacademy.org/video?v=xoUppFlif04
    We test whether Acos(wt) can describe the motion of the mass on a spring by substituting into the differential equation F=-kx

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    Harmonic Motion Part 3 (no calculus)

    by khanacademy 72,714 views

    Learn more: http://www.khanacademy.org/video?v=oqBHBO8cqLI
    Figuring out the period, frequency, and amplitude of the harmonic motion of a mass attached to a spring.

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    Fluids (part 1)

    by khanacademy 221,513 views

    Learn more: http://www.khanacademy.org/video?v=Pn5YEMwQb4Y
    What a fluid is. Difference between liquids and gasses (both fluids).

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    Fluids (part 2)

    by khanacademy 118,241 views

    Learn more: http://www.khanacademy.org/video?v=lWDtFHDVqqk
    Pressure and Pascal's Principal.

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    Fluids (part 3)

    by khanacademy 89,422 views

    Learn more: http://www.khanacademy.org/video?v=5EWjlpc0S00
    Pressure in a fluid at depth

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    Fluids (part 4)

    by khanacademy 70,090 views

    Learn more: http://www.khanacademy.org/video?v=i6gz9VFyYks
    Using our understanding of fluid pressure to figure out the height of a column of mercury.

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    Fluids (part 5)

    by khanacademy 72,979 views

    Learn more: http://www.khanacademy.org/video?v=vzID7ds600c
    Introduction to Archimedes' principle and buoyant force.

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    Fluids (part 6)

    by khanacademy 64,772 views

    Learn more: http://www.khanacademy.org/video?v=wwjtuZ5vTvc
    A couple of problems involving Archimedes' principle and buoyant forces.

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    Fluids (part 7)

    by khanacademy 61,228 views

    Learn more: http://www.khanacademy.org/video?v=G4CgOF4ccXk
    Introduction to the study of moving fluids.

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    Fluids (part 8)

    by khanacademy 55,195 views

    Learn more: http://www.khanacademy.org/video?v=uqyLOuAzbvo
    Beginning of the proof of Bernoulli's Equation.

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    Fluids (part 9)

    by khanacademy 46,126 views

    Learn more: http://www.khanacademy.org/video?v=QX2YLR09Q78
    Second part of the Bernoulli's Equation proof. Beginning of a problem that uses the equation.

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    Fluids (part 10)

    by khanacademy 40,175 views

    Learn more: http://www.khanacademy.org/video?v=NGpJPz44JYc
    Second part of the example that uses Bernoulli's equation.

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    Fluids (part 11)

    by khanacademy 33,081 views

    Learn more: http://www.khanacademy.org/video?v=HnfBFeLunk4
    Clarification of the problem in part 10

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    Fluids (part 12)

    by khanacademy 43,830 views

    Learn more: http://www.khanacademy.org/video?v=xlJYYM5TWoA
    Complete example of a Bernoulli's Equation exercise.

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    Thermodynamics (part 1)

    by khanacademy 380,846 views

    Learn more: http://www.khanacademy.org/video?v=tQcB9BLUoVI
    Intuition of how gases generate pressure in a container and why pressure x volume is proportional to the combined kinetic energy of the molecules in the volume.

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    104

    Thermodynamics (part 2)

    by khanacademy 144,460 views

    Learn more: http://www.khanacademy.org/video?v=x34OTtDE5q8
    Example problem that pv=pv. Introduction to temperature.

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    Thermodynamics (part 3)

    by khanacademy 101,902 views

    Learn more: http://www.khanacademy.org/video?v=HvYUKRMT0VI
    Introduction to Kelvin. Example of a problem involving the ideal gas law

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    106

    Thermodynamics (part 4)

    by khanacademy 78,816 views

    Learn more: http://www.khanacademy.org/video?v=5B1i26dUwME
    Introduction to the concept of a mole. Universal gas constant R. PV=nRT

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    Thermodynamics (part 5)

    by khanacademy 78,247 views

    Learn more: http://www.khanacademy.org/video?v=UekR9J31a2o
    Example problem involving PV=nRT

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    Electrostatics (part 1): Introduction to Charge and Coulomb's Law

    by khanacademy 318,540 views

    Learn more: http://www.khanacademy.org/video?v=NXMgvrS8Gr8
    Introduction to Charge and Coulomb's Law (video from May 2008 that I forgot to upload)

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    Electrostatics (part 2)

    by khanacademy 198,575 views

    Learn more: http://www.khanacademy.org/video?v=0YOGrTNgGhE
    Electric Fields

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    Proof (Advanced): Field from infinite plate (part 1)

    by khanacademy 95,352 views

    Learn more: http://www.khanacademy.org/video?v=prLfVucoxpw
    Electric field generated by a uniformly charged, infinite plate

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    Proof (Advanced): Field from infinite plate (part 2)

    by khanacademy 45,123 views

    Learn more: http://www.khanacademy.org/video?v=TxwE4_dXo8s
    We see that the infinite, uniformly charged plate generates a constant electric field (independent of the height above the plate)

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    Electric Potential Energy

    by khanacademy 243,180 views

    Learn more: http://www.khanacademy.org/video?v=elJUghWSVh4
    Introduction to electric potential

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    113

    Electric Potential Energy (part 2-- involves calculus)

    by khanacademy 112,394 views

    Learn more: http://www.khanacademy.org/video?v=CqsYCIjSm9A
    Electric potential energy difference in a varying field

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    114

    Voltage

    by khanacademy 188,689 views

    Learn more: http://www.khanacademy.org/video?v=zqGvUbvVQXg
    Difference between electrical potential (voltage) and electrical potential energy

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    Capacitance

    by khanacademy 190,693 views

    Learn more: http://www.khanacademy.org/video?v=ngOC4eUQl8Y
    Introduction to the capacitance of a two place capacitor

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    116

    Circuits (part 1)

    by khanacademy 343,516 views

    Learn more: http://www.khanacademy.org/video?v=3o8_EARoMtg
    Introduction to electricity, circuits, current and resistance

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    Circuits (part 2)

    by khanacademy 176,540 views

    Learn more: http://www.khanacademy.org/video?v=7vHh1sfZ5KE
    Resistors in series

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    Circuits (part 3)

    by khanacademy 152,738 views

    Learn more: http://www.khanacademy.org/video?v=ZrMw7P6P2Gw
    Resistors in parallel

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    119

    Circuits (part 4)

    by khanacademy 137,522 views

    Learn more: http://www.khanacademy.org/video?v=3NcIK0s3IwU
    A hairy resistance problem

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    120

    Cross product 1

    by khanacademy 106,029 views

    Learn more: http://www.khanacademy.org/video?v=zA0fvwtvgvA
    Introduction to the cross product

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    Cross Product 2

    by khanacademy 55,378 views

    Learn more: http://www.khanacademy.org/video?v=o_puKe_lTKk
    A little more intuition on the cross product.

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    Cross Product and Torque

    by khanacademy 66,490 views

    Learn more: http://www.khanacademy.org/video?v=s38l6nmTrvM
    The cross product and the direction of torque.

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    123

    Introduction to Magnetism

    by khanacademy 282,352 views

    Learn more: http://www.khanacademy.org/video?v=8Y4JSp5U82I
    An introduction to magnetism

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    124

    Magnetism 2

    by khanacademy 168,192 views

    Learn more: http://www.khanacademy.org/video?v=NnlAI4ZiUrQ
    Magnetic fields and their effects on moving electrical charges

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    125

    Magnetism 3

    by khanacademy 114,491 views

    Learn more: http://www.khanacademy.org/video?v=LTuGQy4rmmo
    Whats happens when a speeding proton goes through a magnetic field

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    126

    Magnetism 4

    by khanacademy 87,784 views

    Learn more: http://www.khanacademy.org/video?v=b1QFKLZC11U
    Part 2 of the proton through a magnetic field problem

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    127

    Magnetism 5

    by khanacademy 83,816 views

    Learn more: http://www.khanacademy.org/video?v=jQ2nD8ZGeEw
    Magnetic force on a wire carrying current.

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    128

    Magnetism 6: Magnetic field due to current

    by khanacademy 122,932 views

    Learn more: http://www.khanacademy.org/video?v=Ri557hvwhcM
    See how a wire carrying a current creates a magnetic field.

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    129

    Magnetism 7

    by khanacademy 73,476 views

    Learn more: http://www.khanacademy.org/video?v=l3hw0twZSCc
    The magnetic force that two current-carrying wires exert on each other.

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    Magnetism 8

    by khanacademy 59,715 views

    Learn more: http://www.khanacademy.org/video?v=4tctB1wZNiI
    More on the forces exerted by 2 current carrying wires on each other.

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    Magnetism 9: Electric Motors

    by khanacademy 83,127 views

    Learn more: http://www.khanacademy.org/video?v=pAgPfr7MkkU
    Using a magnetic field to exert torque on a rotating circuit.

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    Magnetism 10: Electric Motors

    by khanacademy 46,505 views

    Learn more: http://www.khanacademy.org/video?v=cePkWyXRvIQ
    Why the circuit will keep flipping over.

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    Magnetism 11: Electric Motors

    by khanacademy 43,449 views

    Learn more: http://www.khanacademy.org/video?v=XMkUDyl1ZRo
    Using a commutator to solve the flipping problem and create an electric motor.

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    134

    Magnetism 12: Induced Current in a Wire

    by khanacademy 96,195 views

    Learn more: http://www.khanacademy.org/video?v=KuUMUvwvML8
    Induced current and EMF in a moving wire from a magnetic field.

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    135

    The dot product

    by khanacademy 110,651 views

    Learn more: http://www.khanacademy.org/video?v=KDHuWxy53uM
    Introduction to the vector dot product.

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    136

    Dot vs. Cross Product

    by khanacademy 96,811 views

    Learn more: http://www.khanacademy.org/video?v=E34CftP455k
    Understanding the differences between the dot and cross products

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    Calculating dot and cross products with unit vector notation

    by khanacademy 67,065 views

    Learn more: http://www.khanacademy.org/video?v=enr7JqvehJs
    Calculating the dot and cross products when vectors are presented in their x, y, and z (or i,j, and k) components.

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    Introduction to Waves

    by khanacademy 169,409 views

    Learn more: http://www.khanacademy.org/video?v=c38H6UKt3_I
    Introduction to transverse and longitudinal waves

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    Amplitude, Period, Frequency and Wavelength of Periodic Waves

    by khanacademy 181,622 views

    Learn more: http://www.khanacademy.org/video?v=tJW_a6JeXD8
    Amplitude, period, frequency and wavelength of periodic waves

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    140

    Introduction to the Doppler Effect

    by khanacademy 88,665 views

    Learn more: http://www.khanacademy.org/video?v=dc7l7Qqa8xk
    Introduction to the Doppler Effect

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    141

    Doppler effect formula for observed frequency

    by khanacademy 43,537 views

    Learn more: http://www.khanacademy.org/video?v=kGrk6V8tWDY
    Doppler effect formula for observed frequency

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    142

    Doppler effect formula when source is moving away

    by khanacademy 34,514 views

    Learn more: http://www.khanacademy.org/video?v=KkJ0wL9f2VY
    Doppler effect formula when source is moving away

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    143

    When the source and the wave move at the same velocity

    by khanacademy 24,720 views

    Learn more: http://www.khanacademy.org/video?v=4Xgk3vusxT8
    When the source and the wave move at the same velocity

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    144

    Mach Numbers

    by khanacademy 24,120 views

    Learn more: http://www.khanacademy.org/video?v=VlaGxYjnoPY
    Mach numbers

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    Specular and Diffuse Reflection

    by khanacademy 45,360 views

    Learn more: http://www.khanacademy.org/video?v=sd0BOnN6aNY
    Specular and Diffuse Reflection

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    146

    Specular and Diffuse Reflection 2

    by khanacademy 26,642 views

    Learn more: http://www.khanacademy.org/video?v=XR52dXLyz-M
    Specular and Diffuse Reflection 2

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    147

    Refraction and Snell's Law

    by khanacademy 86,744 views

    Learn more: http://www.khanacademy.org/video?v=y55tzg_jW9I
    Refraction and Snell's Law

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    Refraction in Water

    by khanacademy 46,143 views

    Learn more: http://www.khanacademy.org/video?v=jxptCXHLxKQ
    Refraction in Water

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    149

    Snell's Law Examples 1

    by khanacademy 50,116 views

    Learn more: http://www.khanacademy.org/video?v=HahjsBApxLE
    Snell's Law Examples 1

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    150

    Snell's Law Example 2

    by khanacademy 27,902 views

    Learn more: http://www.khanacademy.org/video?v=10LuSfZZa3E
    Snell's Law Example 2

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    151

    Total Internal Reflection

    by khanacademy 58,749 views

    Learn more: http://www.khanacademy.org/video?v=WRuatAcd2WY
    Critical incident angle and total internal reflection

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    Virtual Image

    by khanacademy 58,433 views

    Learn more: http://www.khanacademy.org/video?v=nrOg85VPQgw
    Virtual Image

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    153

    Parabolic Mirrors and Real Images

    by khanacademy 47,919 views

    Learn more: http://www.khanacademy.org/video?v=8X1AS9qD5AQ
    Parabolic Mirrors and Real Images

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    154

    Parabolic Mirrors 2

    by khanacademy 31,420 views

    Learn more: http://www.khanacademy.org/video?v=7m0u6dxA5Xo
    Parabolic Mirrors 2

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    155

    Convex Parabolic Mirrors

    by khanacademy 33,869 views

    Learn more: http://www.khanacademy.org/video?v=dWY25vb1ZB0
    Convex Parabolic Mirrors

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    156

    Convex Lenses

    by khanacademy 65,394 views

    Learn more: http://www.khanacademy.org/video?v=K0sjZ5nqQ7g
    Convex Lenses

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    157

    Convex Lens Examples

    by khanacademy 42,288 views

    Learn more: http://www.khanacademy.org/video?v=xxF_mdoZom0
    Convex Lens Examples

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    158

    Concave Lenses

    by khanacademy 45,412 views

    Learn more: http://www.khanacademy.org/video?v=Vh70PyitQzo
    Concave Lenses

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    159

    Object Image and Focal Distance Relationship (Proof of Formula)

    by khanacademy 33,501 views

    Learn more: http://www.khanacademy.org/video?v=rse0I7rZ8jM
    Object Image and Focal Distance Relationship (Proof of Formula)

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    Object Image Height and Distance Relationship

    by khanacademy 23,681 views

    Learn more: http://www.khanacademy.org/video?v=acQYX4nwhCk
    Object Image Height and Distance Relationship

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    161

    Viewing g as the value of Earth's Gravitational Field Near the Surface

    by khanacademy 20,269 views

    Learn more: http://www.khanacademy.org/video?v=1E3Z_R5AHdg
    Viewing g as the value of Earth's gravitational field near the surface rather than the acceleration due to gravity near Earth's surface for an object in freefall

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