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Q.

A system of two blocks of masses m=2 kg and M=8 kg is placed on a smooth table as shown in figure. The coefficient of static friction between two blocks is 0.5. The maximum horizontal force F that can be applied to the block of mass M so that the blocks move together will be :

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a

9.8 N

b

39.2 N

c

78.4 N

d

49 N

answer is C.

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Detailed Solution

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aAmax=0.5g=4.9 m/s2
For moving together

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Fmax=mTaA =10×4.9 =49 N

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