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Q.

Two blocks of mass 20 kg is connected as shown in the figure then friction force on the block exerted by horizontal surface is (system is released from rest) (g = 10 m/s2)

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a

140 N

b

120 N

c

130 N

d

100 N

answer is D.

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Detailed Solution

Tension in each string 20g2=100NMaximum friction force cannot be greater than Applied force, so f = 100N

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Two blocks of mass 20 kg is connected as shown in the figure then friction force on the block exerted by horizontal surface is (system is released from rest) (g = 10 m/s2)