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Work Done By Pushing On Wall
Purpose
Illustrates that the wall and the floor do no work.
Equipment
Cart with non-rotating wheels, two lead bricks.
Images
Description
The instructor, while standing on a cart weighted with two lead bricks, pushes off against the wall. The energy comes from the pusher, not from the wall or the floor or the air. Be careful. This can be dangerous if you get unbalanced. Of course, this danger to the instructor heightens the interest of the students.
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See pagesc1. center of mass motion
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See pagesc3. first law of motion
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See pagesc4. second law of motion
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See pagesc5. third law of motion
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See pagesc6. friction
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See pagesc7. collisions
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See pagesc8. mechanical energy & power
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See pagesc1. center of mass motion
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See pagesc3. first law of motion
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See pagesc4. second law of motion
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See pagesc5. third law of motion
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See pagesc6. friction
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See pagesc7. collisions
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See pagesc8. mechanical energy & power
Physics Lab Demos