For potential energy to become kinetic, there needs to be an external force that causes an increase in energy and displacement from its original position. For humanity, we also need that force or ...

Gravitational potential energy is the energy an object has by ... The weight \(W\) of the suit case is a downward force of size \(mg\). In lifting the suitcase, you would have to pull upwards ...

An elastic object, such as a spring, stores elastic potential energy when stretched or squashed. The extension of an elastic object is directly proportional to the force applied. This equation ...