a stone X of mass 2 kg is at the height of 2m from the ground level. Another similar stone Y of mass 4 kg is at the height of 4m from the ground level. what is the difference between their potential energy?

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.