Question

What do you mean by the term ‘work’ as used in physics? List two conditions that need to be satisfied for the work to be done on an object.

Answer 1

1. In physics, work is said to be done on an object when a force is applied to the object due to which it moves over a distance.
2. Work done can be calculated as-
   $$\begin{gathered} W=F.s \\ HereW=worddone\left(j\right) \\ F=force\left(N\right) \\ s=displacement\left(m\right) \end{gathered}$$

Hence essential conditions need to be satisfied for the work to be done on an object.

1. A force must act on the object.
2. An object must undergo some displacement.