Question

Define work and write its units.

Answer 1

Whenever a force acting on a body displaces the body through some distance, we can say that work is done on the body. Work is calculated by multiplying the force and the displacement done.

Complete step by step answer:
Work is defined as a force that causes the displacement or the movement of a body. It is a scalar quantity.
In simple, we can say that work is the force that is applied to some distance.
Examples of work :
1. Lifting of an object
2. Driving a car up the hill
3 Pulling or pushing a heavy load.

Units of work:
SI Unit: joule (J)
Other units: Erg, Foot-pound

• Work done by the force is equal to the product of the force and the displacement of the object. It involves both the force applied and the displacement of the object.
• Work done is positive, when the force displaces the object in its direction. Work done is negative, If the force and the displacement are in opposite directions.
• If the direction of the displacement and the force are perpendicular to each other, then the work done is zero.

Note:

Energy is associated with the work. The capacity of the body to do work is called energy. Thus we can say that the body is said to possess the energy when it is having the capacity to do the work. The unit of energy is also the same as that of work.
Light energy, kinetic energy, chemical energy, potential energy, electrical energy are some of the various forms of energy that are available to us.