What is energy?

Energy is a universal term we use in our daily life.

In physics, energy is defined a quantitative property that can be transferred from an object to do any kind of physical activity.

In simple words,
Energy is the ability of something to do work.

Energy can exist in many forms ⬆️. The sun is considered the elemental form of energy on Earth.

All forms of energy are either kinetic or potential ⬆️.

According to the laws of conservation of energy, “ energy can neither be created nor destroyed but can only be converted from one form to another”.

Joule (J) is the SI unit of energy. One joule is the energy transferred to an object when a force of one newton acts on that object in the direction of force through a distance of one meter.
However, energy is also expressed in other units not part of the SI (ergs, calories), which require a conversion factor when expressed in SI units.

Joule is named after the physicist James Prescott Joule (1818-1889).

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