In the arrangement shown, there is no friction between the 3 kg block and ground, but the coefficient of static friction between 2 kg block and 3 kg block is 0.8. If the blocks move together without any relative motion between them, then the frictional force acting on the 3 kg block is

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16 N

10 N

12 N

8 N

answer is C.

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Detailed Solution

a = Acceleration of the system of blocks =202+3m/s2=4 m/s2∴ f=3 x 4 N=12 N

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