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A box slides down a ramp from a moving truck to the ground. If we take friction

ID: 1487369 • Letter: A

Question

A box slides down a ramp from a moving truck to the ground. If we take friction into account, how does the Kinetic Energy of the box just before reaching the ground compare to the Gravitational Potentional Energy of the box at the top of the ramp?

A. KE is greater than PE

B. KE is equal to PE

C. KE is less than PE

D. We cannot tell without knowing the height of the ramp.

Since friction is taken into account, would it not take away from the Kinetic Energy along on the way down? I'm thinking its C. KE is less than PE, but I just wanted to be sure.

Explanation / Answer

yes you are correct. KE will less that PE as some energy is lost in the form of work done by friction.

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