Q:

# What is the scientific definition of energy?

A:

In the study of physics, energy is defined as the capacity to do work. That energy or force is measured in units called joules.

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Work involves the application of force on an object that causes movement across a distance. For example, pushing a shopping cart involves exerting force to move it over the ground. The basic equation to illustrate this is:

• Work done = force x distance, or
• W = F x d, with W being work done in joules, F being force in Newtons and d measured in meters.

The activity of work essentially involves the transfer of energy. In the previous example, energy is transferred from a person to the shopping cart.

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