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Two block , with masses m(1) and m(2) ar...

Two block , with masses `m_(1)` and `m_(2)` are staked as shown in fig and placed on a frictionless horizontal surface . There is a friction between the two block .An external force of magnitude `F` is applied to the top block at an angle `alpha` below the horizontal . The coefficient of friction between `m_(1)` and `m_(2)` are `mu_(s)`
b. If the two blocks move together, find their acceleration
b . Calculate the maximum value of force so that blocks will move together

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