Question

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







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Answer 1

Answer:

400w

Explanation:

In 1s 2m of the pipe's length of water is ejected at a speed 2m/s. The mass of this water is 100 x 2 = 200kg. So the kinetic energy generated per sec by the action of the pump is 0.5 x 200 x 2² = 400J. Thus the power of the engine is 400W.

Answer 2

Answer:

800 W

Explanation:

Refer pic ...

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