An engine pumps water through a hose pipe water passes through the pipeand leaves it with velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m .What is the power of the engine ?

An engine pumps water through a hose pipe water passes through the pip

1.	An engine pumps water through a hose pipe water passes through the pipeand leaves it with velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m .What is the power of the engine ?
Answer» 400 W 200 W 100 W 800 W Solution :The MASS of water flow in one second from the PIPE ` = m/t` ` :. M = m/l xxl/t` = mass per unit `xx ` velocity ` :. M = m/l V` Powermeans kinetic energy of flowing water , ` :. "Power " P = 1/2 Mv^(2)` ` = 1/2 ((mv)/l)v^(2)` `= 1/2 .(mv^(3))/l ` ` = 1/2 xx100 xx(2)^(3)` ` [ :. m/l = 100 "kg/m"]` = 400 W