In the arrangement shown, mass of block A is 4 kg and the maximum mass of block B for which the system of blocks will be in equilibrium is 3 kg. What is the total reaction exerted by the table on block A?

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50 N

40 N

402 N

60 N

answer is A.

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Detailed Solution

N = Normal reaction of the table on block A = 40 NFrictional force on A, fmax⁡=30 N∴ R=N2+fmax⁡2=402+302N=50 N

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