Problem 7.3

Please wait for the animation to completely load.

A 12-kg box slides down a 26.56° frictionless ramp at constant speed as shown in the animation (position is given in meters and time is given in seconds).  Note that the hand does work on the box.  Restart.

1. What is the work done on the box by the external force (hand) during the animation? 
2. What is the change in gravitational potential energy of the box during the animation? 
3. What is the change in kinetic energy of the box during the animation?
   

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