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The conditions need to be satisfied in o...

The conditions need to be satisfied in order to say that work has been done are

A

a force should act on the object

B

the object must be displaced

C

both A and B

D

no condition is required

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • The condition to be satisfied in order that one root of x^(3)+bx^(2)+cx+d=0 is the sum of the other two roots is

    A
    `3d^(2)+b^(3)=b^(2)c`
    B
    `6d+b^(3)=2bc`
    C
    `8d+b^(3)=4bc`
    D
    `8d+b^(2)=4bc`

  • A hope of radius 2 m weights 100 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 20 cm/s. How much work has to be done to stop it?

    A
    4 J
    B
    8 J
    C
    12 J
    D
    16 J

  • If the displacement of the object is in the direction opposite to the direction of force applied, then the work done is ……………….

    A
    Positive
    B
    Negative
    C
    0
    D
    none of these

    • Similar Questions

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    A hoop of radius 2 m weighs 100 kg. It rolls along a horizontal floor so that its centre of mass has a speed of 20 cm/s. How much work has to be done to stop it?

    State the conditions under which a force does no work .

    State the conditions under which a force does no work

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