The block slides down an inclined friction-less track to a infinite hill that the block begins to climb and slow down. Is energy conserved or not?

Suppose you were asked to find the torque about point p due to the normal force n in terms of given quantities. which method of finding the torque would be the easiest to use?

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

The two required components for a generator are