A given object is raised vertically 5m above the horizontal. Which of the following does not change if instead the object is pushed up an incline subject to friction to the same vertical height?
A. The work done on the object
B. The force exerted on the object
C. The distance traveled by the object
D. The final potential energy of the block.
D
A is wrong because additional work is done overcoming friction. C is wrong because the hypotenuse of a right triangle is always the longest side. D is correct because the potential only depends on the final position of the block.
