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What is the work done by the centripetal...

What is the work done by the centripetal force in circular motion ?

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In circular motion the centripetal force does not do work on the object moving on a circle as it is always perpendicular to the displacement.
`F dr cos 90^(@)[cos 90^(@) = 0]`
`therefore W = 0`
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Knowledge Check

  • The centripetal force is

    A
    `(mv^2)/(r )`
    B
    `r omega^2`
    C
    both (a) and (b)
    D
    none

  • Centripetal force acts in

    A
    Inertial frame
    B
    non-inertial frame
    C
    both (a) and (b)
    D
    linear motion

  • The origin of the centripetal force can be

    A
    gravitational force
    B
    frictional force
    C
    coulomb force
    D
    all the above

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    In the following question, a statement of Assertion is followed by a statement of Reason. Assertion: When a body moves along a circular path, the work done by a centripetal force is zero. Reason: The centripetal force is utilised in moving the body along the circular path and hence the work is done. Choose one of the following statements is correct?

    In the following question, a statement of Assertion is followed by a statement of Reason. Assertion: When a body moves along a circular path, the work done by a centripetal force is zero. Reason: The centripetal force is utilised in moving the body along the circular path and hence the work is done. Choose one of the following statements is correct?

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