Answer to Question #181216 in Physics for Desiree Dimple

Question

A girl pushes a 50-kg box up a ramp 25 m in length and inclined at 10° with the horizontal. What potential energy change does the crate experience?

Answer 1

Find height of the ramp above the floor:

$$h=L\sin\theta.$$

Potential energy change:

$$W=mgh=mgL\sin10°=2127\text{ J}.$$