Work & Energy

The total mechanical energy of an isolated system remains constant. Energy transforms between kinetic and potential forms.

Gravitational potential energy (GPE) is the energy stored by an object due to its height above the ground. The greater the height and mass, the more GPE it has. As an object falls, its GPE converts to kinetic energy.

Kinetic energy is the energy an object has because of its motion. It depends on the object's mass and the square of its speed. Doubling the speed quadruples the kinetic energy. The kinetic energy of an object can be transferred to other forms when it stops.

What power means in physics, how to calculate it, and the difference between energy and power.

Work is done when a force causes displacement. The work-energy theorem connects net work to change in kinetic energy.