An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of $2 \mathrm{~ms}^{-1}$. The mass per unit length of water in the pipe is $100 \mathrm{kgm}^{-1}$. What is the power of the engine?

Question

Aicharya · Accepted Answer

$\begin{aligned} 	ext { Power } & =\mu \mathrm{v}^3=\frac{\mathrm{m}}{\mathrm{l}} 	imes \mathrm{v}^3 \ & =100 	imes(2)^3=800 \mathrm{~W} \end{aligned}$ .

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of $2…

Solution