Work, Power and EnergyMedium
Question
An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of 2 m/s. The mass per unit length of water in the pipe 100 kg/m. What is the power of the engine?
Options
A.400 W
B.200 W
C.100 W
D.800 W
Solution
Here,
Mass per unit length of water, μ = 100 kg/m
Velocity of water, v = 2 m/s
Power of engine, P = μv3
= (100 kg/m) (2 m/s)3 = 800 W.
Mass per unit length of water, μ = 100 kg/m
Velocity of water, v = 2 m/s
Power of engine, P = μv3
= (100 kg/m) (2 m/s)3 = 800 W.
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