Find the maximum value of (M/m) in the s...

Find the maximum value of (M/m) in the situation shown in figure so that the system remains at rest. Friction coefficient of both the contacts is `mu` , string is massless an pulley is friction less.

`(mu)/("sin"theta-mu"cos"theta)`

`(2mu)/("sin"theta+mu"cos"theta)`

`(mu)/("sin"theta+mu"cos"theta)`

`(mu)/("cos"theta-mu"cosin"theta)`

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