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A box is released from rest to slide all the way down a ramp with friction.

Which one of the following statements most accurately describes energy transformations during this motion?

A

The box's initial kinetic energy is transformed into gravitational potential energy of the box-Earth system.

B

The initial gravitational potential energy of the box-Earth system and thermal energy are both transformed into kinetic energy.

C

The initial gravitational potential energy of the box-Earth system is transformed into thermal energy and kinetic energy.

D

The box's initial kinetic energy is transformed into thermal energy and gravitational potential energy of the box-Earth system.

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