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When the force retards the motion of the...

When the force retards the motion of the body, the work done is :

A

zero

B

negative

C

positive

D

postive or negative depending upon the magnitude of force and displacement.

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MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
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  3. When the force retards the motion of the body, the work done is :

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  4. In which of the following examples, work done is negative?

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  5. In which of the following applications is work is not done?

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  12. Express kilowatt hour in terms of joules.

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  14. Two children A and B each weigh 20 kg climb a rope up a height of 10 m...

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  15. In a house 3 bulb of 25 W. Each are used for 5 hours a day. Calculate ...

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  16. State the law of conservation of energy. Show that the energy of a fre...

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  17. The work done on a object does not depend upon the

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  18. In case of negative work the angle between the force and displacement ...

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  19. Water stored in a dam possesses

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