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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

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • In which of the following cases no work is done by the force?

    A
    (a) A man carrying a bucket of water, walking on a level road with a uniform velocity.
    B
    (b) A drop of rain falling vertically with a constant velocity.
    C
    (c) A man whirling a stone tied to a string in a circle with a cosntant speed.
    D
    (d) A man walking upon staircase

  • Work done by a frictional force is

    A
    negative
    B
    positive
    C
    zero
    D
    all of the above

  • the work done by applied force is

    A
    10 J
    B
    50 J
    C
    100 J
    D
    150 J

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