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An engine pumps water continuously throu...

An engine pumps water continuously through a hose. Water leaves 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 impartd to water?

A

`mv^(2)`

B

`(1)/(2)mv^(2)`

C

`(1)/(2)m^(2)v^(2)`

D

`(1)/(2)mv^(3)`

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-WORK, ENERGY AND POWER-Assignment (SECTION - C)
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  2. A particle of mass M starting from rest undergoes uniform acceleration...

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  3. An engine pumps water continuously through a hose. Water leaves the ho...

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  4. A body of mass 1 kg is thrown upwards with a velocity 20 ms^(-1). It m...

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

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

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  7. A sheel of mass 200g is ejected from a gun of mass 4 kg by an explosio...

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  8. A vertical spring with force constant K is fixed on a table. A ball of...

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  9. The potential energy of a long spring when stretched by 2 cm is U. If ...

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  10. A body of mass 3kg is under a constant force, which causes a displacem...

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  11. 300J of work is done in slinding a 2 kg block up an inclined plane of ...

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  12. A bomb of mass 30kg at rest explodes into two pieces of masses 18 kg a...

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  13. A Force F acting on an object varies with distance x as shown in the f...

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  14. The angle between the two vectors A=3 hati+4hatj+5hatk and B=3hati+4ha...

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  15. Three vectors vecA, vecB and vecC satisfy the relation vecA. vecB=0 an...

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  16. If a unit vector is represented by 0.4 hati+0.7 hatj + chatk then the ...

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  17. If a vector 2hati +3hatj +8hatk is perpendicular to the vector 4hati -...

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  18. The work done by an applied variable force F=x+x^(3) from x = 0 m to x...

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  19. When a body moves with a constant speed along a circle

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  20. A position dependent force F=7-2x+3x^(2) acts on a small body of mass ...

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