A body of mass 1 kg is rotating in a circular path of radius 1 m with constant velocity of 5 rev/sec. The work done in one complete revolution is
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A body of mass 1 kg is rotating in a circular path of radius 1 m with constant velocity of 5 rev/sec. The work done in one complete revolution is
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Answer:
in one complete revolution displacement is zero so work done is zero.
Given:
A body of mass 1 kg is rotating in a circular path of radius 1 m with constant velocity of 5 rev/sec.
To find:
Work done in one complete revolution.
Calculation:
Work done by a force causing a displacement of d is given as :
Here is the angle between the force vector and displacement vector.
Now , in a circular trajectory the force victor is contributed by the centripetal force which is located at an angle of 90° to the displacement vector.
So, irrespective of the displacement travelled in a circular trajectory the work done will always be zero.
So, final answer is: