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What is power?...

What is power?

A

Rate of change in momentum

B

Rate of change in energy

C

A force through which an object moves

D

Rate of change of force

Text Solution

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The correct Answer is:
B
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KUMAR PRAKASHAN-WORK AND ENERGY -QUESTION & ANSWER (CHOOSE THE CORRECT OPTION FROM THOSE GIVEN BELOW EACH QUESTION)
  1. When spring is compressed its potential energy ………..

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  2. What is the unit of work in the SI system of unit?

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  3. What is power?

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  4. A person of mass 55kg pushesh a wall. Work done by this person …………..

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  5. In momentum of the object having mass 4kg is 20kgms^(-1), what would b...

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  6. An object of mass 2kg is thrown in the upward direction with velocity ...

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  7. The kinetic energy of the object

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  8. An object of mass 100g moves with speed 1ms^(-1). Its kinetic energy w...

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  9. When the speed of a car moving with accelerated motion on a horizontal...

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  10. A bullet of mass 20g fired from a rifle is found to cover the distance...

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  11. A body is thrown up with a kinetic energy of 10 J. If it attains maxim...

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  12. If an object is falling freely from certain height towards the surface...

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  13. The work done on the object is negative, then the measure of angle bet...

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  14. The diameter of an iron sphere of mass 10 kg is same as that of alumin...

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  15. A girl is carrying a school bag of 3 kg mass on her back and moves 200...

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  16. Which of the following is not the unit of energy?

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  17. Work done on an object is not dependent on ………..

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  18. Water stored in the dam ………..

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  19. A body is falling freely from a height h. When it covers distance (h)/...

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  20. A boy lifts a mass of 300g for 1.2 second at height of 4m. What would ...

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