What is Energy?

The universe is composed of matter in different forms, and all forms of matter contain energy.  The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants ca...

Energy is defined as the ability to do work. Work is defined as the distance covered by an object in response to an applied force. For example, when a book is lifted from the ground and put  on a table, work is done against the force of gravity. 

Energy is categorized into two main types － potential and kinetic.

Potenti...