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In which of the following, the work done...

In which of the following, the work done by the mentioned force is negative ? The work done by

A

the tension in the cable while the lift is ascending

B

the gravitational force when a body slides down an inclined plane

C

the applied force to maintain uniform motion of a block on a rough horizontal surface

D

the gravitational force when a boby is thrown up

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The correct Answer is:
D
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NARAYNA-WORK POWER AND ENERGY-C.U.Q-Key
  1. In which of the following, the work done by the mentioned force is neg...

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  2. A man pushes a wall and fails to displace it.He does

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  3. A bucket full of water is drawn up by a person. In this case the work ...

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  4. A man is rowing a boat upstream and inspite of that the boat is found ...

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  5. A ball is thrown vertically upwards from the ground. Work done by air ...

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  6. An agent is moving a positively charged body towards another fixed pos...

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  7. Work done by force of static friction .

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  8. Potential energy is defined for

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  9. Which of the following forces is called a conservative force ?

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  10. Identify the non-conservative force in the following

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  11. If x,F and U denote the dispalcement, force acting on and potential en...

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  12. In the case of conservative force

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  13. The change in kinetic energy per unit 'space' (distance) is equal to

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  14. When the momentum of a body a doubled, the kinetic energy is

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  15. For the same kinetic energy, the momentum shall be maximum for which o...

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  16. If the momentum of a particle is plotted on X-axis and its kinetic ene...

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  17. When two identical balls are moving with equal speed in opposite direc...

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  18. The product of linear momentum and velocity of a blood represents.

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  19. The KE of a freely falling body

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  20. Consider the following two statements: A. Linear momentum of a syste...

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