Professor Lewin uses a giant bowling ball pendulum to demonstrate the law of conservation of energy. He puts his neck on the line when he releases the bowling ball from his chin and his students gasp as the ball returns. This is a great demo for teac...her to use in their own classroom. (03:35)[more]

From youtube.com, produced by Jonathan Thomas-Palmer

Learn how to use the Conservation of Mechanical Energy equation by solving a trebuchet problem. (08:49)
This is an AP Physics 1 topic.
Content Times:
0:08 The problem
1:08 Why mechanical energy is conserved
1:37 Setting the zero line and initia...l and final points
2:32 The three types of mechanical energy
3:55 Canceling mechanical energies from the equation
4:54 Solving the equation
6:18 It’s final speed not final velocity
6:51 Why we can’t use the projectile motion equations
7:43 Do we really have to write all that down? Yes.
Thank you to my students Will, Jacob, Natalie and Mery; my students who built and let me use their trebuchet![more]

From youtube.com, produced by Jonathan Thomas-Palmer

Ian Terry, winner of Big Brother 14, makes a special appearance to help us learn about Conservation of Mechanical Energy. See several demonstrations and understand when mechanical energy is conserved. (08:26)
Content Times:
0:01 Reviewing the thre...e different types of mechanical energy
0:23 Mr. Terry drops an object for our first demonstration
0:58 Calculating Kinetic Energy and Gravitational Potential Energy
2:53 Mechanical energy data table
3:37 Conservation of mechanical energy graph
5:10 When is mechanical energy conserved?
7:13 A second demonstration of conservation of mechanical energy[more]

From youtube.com, produced by Jonathan Thomas-Palmer

Billy helps you review Conservation of Mechanical Energy, springs, inclines, and uniformly accelerated motion all in one example problem. Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:10 The problem
0:38 Listing the known va...lues
1:40 Using Conservation of Mechanical Energy
2:56 Canceling out the Mechanical Energies which are not there
4:18 Drawing the Free Body Diagram
4:52 Summing the forces in the perpendicular direction
5:26 Summing the forces in the parallel direction
6:59 Using Uniformly Accelerated Motion
7:56 Finding the maximum height Next Video: Work due to the Force of Gravity on an Incline by Billy. (04:49)[more]

Using the law of conservation of energy to see how potential energy is converted into kinetic energy. This video, which is suitable for high school students, starts with a black screen because the instructor, in his conversational tone, uses it as a ...'chalkboard.' Instructor uses different colors for clarification. (10:07)[more]

Which does more damage: a car hitting a wall at 100 mph, or 2 cars colliding at 50 mph? In this experiment the mythbusters find out and Newton's Laws are proven to be correct (05:47).

Here's an old one from Bill Nye. He uses roller skate cars and water balloon passengers to talk about momentum, potential energy, kinetic energy, and impulse (07:29).

From learner.org, produced by California Institute of Technology

The music and mathematics of nature. The restoring force and inertia of any stable mechanical system cause objects to execute simple harmonic motion, a phenomenon that repeats itself in perfect time. (29:02)

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