# What is the difference between energy and power?

If we get even more technical, energy is the ability to do work and power is the pace at which we work (or energy is supplied, according to the Encyclopedia Britannica). Doing the same job repetitively would require the same amount of energy, but you can apply more power if you want to do it faster. In physics, energy is defined as the amount of work that can be done by force, while power is defined as the speed at which work is done. Energy and power are closely related, but they are not the same physical quantity.

Energy is the capacity to cause change; power is the speed at which energy moves or is used. Energy changes from one form to another, but not power. If something has to happen, the energy is said to change shape. Power is only known to measure how fast the change has occurred; in other words, power is defined as the rate at which energy is converted every second.

The different forms of energy could be electrical energy, which is the speed at which a circuit transfers electrical energy, human energy and optical energy. Before venturing into the difference between power and energy, you should also know that there are only two sources of energy: renewable and non-renewable.