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A sphere of mass m is tied to end of a s...

A sphere of mass m is tied to end of a string of length l and rotated through the other end along a horizontal circular path with speed v . The work done in full horizontal circle is

A

zero

B

`((mv^(2))/(l))2pi l`

C

`mg 2pi l`

D

`((mv^(2))/(l))(l)`

Text Solution

Verified by Experts

The correct Answer is:
A
The work done is zero because the C.P force is perpendicular to the directio of v.
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