What do you mean by gravitational energy?

We all know instinctively that a heavy weight raised above someone's head represents a potentially dangerous situation. The weight may be well secured, so it is not necessarily dangerous. Our concern is that whatever is providing the force to secure the weight against gravity might fail. read more

Gravitational potential energy is changing into kinetic energy. In step 3, it has reached the ground but not quite hit it yet. In the instant before it hits the ground, the ball is pretty much at the height it started before you lifted it up. read more

Electrical energy from the grid is transferred into gravitational potential energy of the person and heat due to friction within the elevator system. Because the elevator car is counterweighted, there is no change in the gravitational potential energy of the elevator-counterweight system. read more