Explain qno.11.option(1)
A block of mass m is being pulled upon the rough 
inclined plane by a man delivering constant power P. 
The coefficient of friction between the block and the 
inclined is $\mu$. The maximum speed of block during 
ascent is 

$$\begin{gathered} \left(1\right)\frac{p}{mg\sin \theta +\mu mg\cos \theta } \\ \left(2\right) \frac{2p}{mg\sin \theta -\mu mg\cos \theta } \\ \left(3\right)\frac{p}{mg\sin \theta -\mu mg\cos \theta } \\ \left(4\right)\frac{3p}{mg\sin \theta -\mu mg\cos \theta } \end{gathered}$$