Question

In an ideal pulley system, a woman lifts a 100-n crate by pulling a rope downward with a force of 25 n. for every one-meter length of rope she pulls downward, the crate rises _______.

Answer 1

We can use conservation of energy to solve this question. The woman increases the potential energy of the box by applying her force over a certain distance. The work that the woman does is force * distance. The work the woman does is 25 N * 1 meters = 25 Joules. 25 Joules is the increase in potential energy of the box. 100 * distance of the box = 25 distance of the box = 0.25 meters Therefore, for every one meter the woman pulls downward, the box rises a distance of 0.25 meters.