Question

State the unit of Energy and define it.

Answer 1

Energy:

• The energy is measured in the same unit as work.
• Therefore the S.I. unit of energy is the joule (symbol J).
• A body is said to possess an energy of one joule if a force of 1 newton moves the body by a distance of $1meter$ in the direction of the force.
• Another unit of energy is a calorie (symbol cal) where $1cal=4.2J$.
• A bigger unit of kilocalorie (symbol kcal) where $1kcal=1000cal$.

A diagram to represent energy:

Hence, as in the diagram, the energy is in the form of a bundle.