Energy – Whenever we do any work, we feel tired as we expend some energy. Energy spent appears in the form of work done. Energy is defined as the ability of a body to do work. Energy has the same units as that of work . S.I. unit of energy is “joule’, same as that of work. Since work is a scalar, energy is also a scalar quantity . Types of Energy Mechanical energy Heat energy Light energy Sound energy Electrical energy Nuclear energy Mechanical energy is classified further into potential energy and kinetic energy . Energy can neither be created nor be destroyed but it can be transformed from one form to another. This is known as the law of conservation of energy. Kinetic energy Object in motion possess energy. We call this energy kinetic energy. A falling coconut, a speeding car, a rolling stone, a flying aircraft, flowing water, blowing wind, a running athlete etc. Possess kinetic energy. In short, kinetic energy is the energy possessed by an object...