Question

Define SI unit of work.

Answer 1

1. $Workdone\left(W\right)=Force\left(F\right).Displacement\left(s\right)$
   $$\begin{gathered} ifF=1Newtonands=1meter \\ W=1N\times 1m=1Joule \end{gathered}$$
2. SI unit of work done is Nm or joule.
3. Work is said to be 1 joule when a force of 1N acts on a body and displaces it by 1 m along the line of force.