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

The block has mass M and rests on a surface for which the coefficient of friction is $\mu$. If a force $\mathrm{F}={\mathrm{kt}}^2$ is applied to the cable (see figure), the power developed by the force $F$ at $t=t_2$ is $\frac{384000}{n}$ Watt. Find $n$. (Given : $\mathrm{M}=20\mathrm{kg},\mu =0.4,\mathrm{k}=40\mathrm{N}/{\mathrm{s}}^2,{\mathrm{t}}_2=3\sec$.)