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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a
50 N
b
40 N
c
402 N
d
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+fmax2=402+302N=50 N