Question

Work is always done on a body when

• A. a force acts on body to displace it.
• B. it moves through a certain distance.
• C. it experiences an increase in energy through a mechanical influence.
• D. there is no displacement.

Answer 1

The correct option is A a force acts on body to displace it.

Work done is given by

$W=Fd$ where $F$ is Force and $d$ is displacement

Hence two conditions need to be satisfied for work to be done:

(i) a force should act on an object

(ii) the object must be displaced.

So option A is correct.