Question

A pair of bullocks exerts a force of $140N$ on a plough. The field being ploughed is $15m$ long. How much work is done in ploughing the length of the field?

Answer 1

Step 1: Given data

Force exerted by the bullocks o a plough, $\mathrm{F}=140N$

Displacement while ploughing, $\mathrm{S}=15m$

Step 2: Calculate the work done

The work done $\mathrm{W}$ is calculated below,

$$\begin{gathered} \mathrm{W}=\mathrm{F}\times \mathrm{S} \\ \mathrm{W}=140N\times 15m \\ \mathrm{W}=2100J \end{gathered}$$

Hence, the work done in ploughing the length of the field is $2100J$.