Question

What is work done ?give its types with example​

Answer 1

Work: In physics work is said to be done when a force acting on a body displaces it through a certain distance. ... Examples of Positive Work: (1) When a spring is stretched, the work done by the stretching force is positive as the force acts in the direction of displacement of the spring.

ex

A force must cause a displacement in order for work to be done. A book falls off a table and free falls to the ground. This is an example of work. There is a force (gravity) which acts on the book which causes it to be displaced in a downward direction (i.e., "fall")

Answer 2

Work is done when a force produces motion. For example, when an engine moves a train along a railway line, it is said to be doing work; a horse pulling the cart us also doing work; and a man climbing the stairs of a house is also doing work in moving himself against the force of gravity. The work done by a force in a body depends on two factors:

1) magnitude of the force, and

2) distance through which the body moves ( in the direction of force).

We can now define work as follows :Work done in moving a body is equal the product of force exerted on the body and the distance moved by the body in the direction of force. That is,

Work = force × distance moved in the direction of force

Means, work = Force *displacement