Physics - W.E.P. Question with Solution | TestHub

Net work done by the force = area under the curve

$=\frac{4\times 10}{2}+4\times 10+\frac{4\times 10}{2}=80 \text{J}$

According to work-energy theorem

ΔK.E. = W_net

$\frac{1}{2}\text{m}{\text{v}}^2-0=80\text{or}\frac{1}{2}\times 0·1{\text{v}}^2=80$

$\text{v}=\sqrt{1600}=40{\text{m s}}^{-1}$