Question

a force of 10 N acts on a body towards the east . the work done by the force while the body moves through 1 m in the east-north direction (midway between east and north is what ?

Answer 1

$$\begin{gathered} \mathrm{Work}\mathrm{done}: \\ \mathrm{W}=\mathrm{Fs}\mathrm{cos\theta } \\ =10\times 1\times \cos {45}^{\mathrm{o}} \\ =7.07\mathrm{J} \end{gathered}$$