Question

1. What is a work? When is work said to be done? Explain with the help of
an example.​

Answer 1

Answer:

A work is said to be done when

1) A force should act on an object.

2) The object must be displaced.

when you move a book then the work is said to be done

Answer 2

Answer:

When force and displacement are in the same direction, the work performed on an object is said to be positive work. Example: When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work.

Explanation:

Work is said to be done when the force applied on a body makes the body move (i.e., there is the displacement of the body). For example, a man pushing a car and a cyclist while pedaling a cycle does work, but a man who tries to push a wall does not do any work as the wall does not move.

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