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A smooth ring of mass M is threaded on a...

A smooth ring of mass M is threaded on a string whose ends are then threaded over two smooth fixed pulleys with masses m and m' tied on to them respectively. The various portions of strings are vertical. The system is free to move. What is the condition if M alone is to remain at rest ?

A

`(4/M)=(1/M)+(1/M)`

B

`(2/M)=(1/m)+(1/m')`

C

`(1/M)=(1/m)+(1/m')`

D

`(3/M)=(1/m)+(1/m')`

Text Solution

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The correct Answer is:
A
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