Question

what happens to the potential energy of a body when its height is doubled

Answer 1

potential energy is product of mass height and gravity
so potential energy also doubles

Answer 2

Answer:

Since the gravitational potential energy of an object is directly proportional to its height above the zero position, a doubling of the height will result in a doubling of the gravitational potential energy. A tripling of the height will result in a tripling of the gravitational potential energy.