Change the height of the ramp. Calculate the efficiency. How does the efficiency of the inclined plane depend on the height?

The “golden rule” of mechanics says that in the absence of frictional force, the work done when lifting the body up the vertical to a height h is equal to the work when lifting the body along an inclined plane to a height h with a uniform movement of the body.

If the height of the inclined plane is increased without changing the length of the plane, then the angle of inclination will increase, the friction force will decrease, which means that the work against friction forces will decrease, which means the efficiency of the inclined plane will increase.