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A string is wrapped several time on a cy...

A string is wrapped several time on a cylinder of mass `M` and radius `R`, the cylinder is pivoted about its axis of symmetery . A block mass of `m` tied to the string rests on support so that the string is black. The block is lifted upto a height `h` and the support is removed. (shown in figure)

If `M=m`, what friction of `KE` is lost due to the jerk developed in the string

A

`1//2`

B

`2//3`

C

`1//3`

D

`1//4`

Text Solution

Verified by Experts

The correct Answer is:
C
For `M=m,K_(1)=(2K_(0))/3` so the fraction lost is `((K_(0)-K_(1))/(K_(0)))=1/3`
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