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An engine pumps water continously throug...

An engine pumps water continously through a hose. Water leave the hose with a velocity `v` and `m` is the mass per unit length of the Water jet. What is the rate at Which kinetic energy is imparted to water?

A

`1/2 m^2v^2`

B

`1/2 mv^3`

C

`mv^3`

D

`1/2 mv^2`

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SL ARORA-Work, Energy and power-EXERCISE
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  2. A body of mass 1 kg is thrown upwards with a velocity 20 ms^(-1). It m...

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  3. An engine pumps water continously through a hose. Water leave the hose...

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  4. A block of mass m attached in the lower and vertical spring The spring...

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  5. The potential energy of a system increased if work is done

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  6. A body projected vertically from the earth reaches a height equal to e...

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  7. An engine pumps water through a hose pipe. Water passes through the pi...

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  8. The heart of a man pumps 5 liters of blood through the arteries per mi...

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  9. A car of mass m starta from rest and accelerates so that the instyanta...

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  10. A partical of mass m is driven by a machine that deleveres a constant ...

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  11. Water falls from a height of 60 m at the rate 15 kg//s to operate a tu...

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  12. The power of a water pump is 2 kW. If g = 10 m//s^2, the amount of wat...

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  14. A shell in its flight, explodes into four unequal parts. Which of the ...

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  15. A body of mass m moving with velocity 3km//h collides with a body of m...

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  16. A metal ball of mass 2 kg moving with speed of 36 Km//h has a collisio...

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  17. Two identical balls A and B collide head on elastically. If velocities...

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  18. The coefficient of restitution e for a perfectly elastic collision is

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  19. A ball moving with velocity 2 ms^(-1) collides head on with another st...

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  20. Two particles A and B, move with constant velocities vec(v(1))" and "v...

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