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For the arrangement shown in figure, mas...

For the arrangement shown in figure, mass of A is 50 kg, mass of B is 70 kg, coefficient of static friction of all plane surfaces is `mu_s=0.3` If the largest value of mass C (in kg), so that blocks A and B remain at rest) is M Find `M/9` (neglect friction in the pulleys). `[g =10m//s^2 ]`

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