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NEET2010PhysicsCenter of Mass, Momentum and CollisionActual

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

Options

  1. A400 ~W
  2. B200 ~W
  3. C100 ~W
  4. D800 ~W

Correct answer

D. 800 ~W

Step-by-step solution

aligned Power & = v ^3= m l v ^3 & =100 (2)^3=800 ~W aligned

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