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When a body travels in a circular path a...

When a body travels in a circular path and covers a distance equal to 1/4th of its circumference can we conclude that work done is zero?

A

yes

B

no

C

both (a) and (b)

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
As at any point on the circle the displacement is tangential to radius vector so work done is zero, also with respect to displacement work is done as there is a relative displacement from initial position to final position.
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Knowledge Check

  • When a body travels a circular path such that its displacement is maximum equal to the diameter of the circle can we conclude work done is zero.

    A
    Yes
    B
    No
    C
    data insufficient
    D
    none of these

  • An object of mass m is travelling at constant rate b in a circular path of radius r. how much work is done by the centripetal force during one half of a revolution?

    A
    `pimv^(2)`
    B
    `2pimv^(2)`
    C
    0
    D
    `pimv^(2)r`

  • Work done by a body moving on a circular track is zero at every instant because:

    A
    displacement is zero.
    B
    displacement is perpendicular to the centripetal force.
    C
    there is no force acting.
    D
    reason is not mentioned in the other options.

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    When a body moved along a straight line from A to B its velocity vector is represented by a straight line - directed from A to B . But " when the same body rotates in circular path is velocity vector is represented by a straight line perpendicular to the plane of the circular path " . Why ?

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