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Q.

A block A of mass 3kg and another block B of mass 2 kg are connected by a light inextensible string as shown in figure. If the coefficient of friction between the surface of the table and A is 0.5. What maximum mass C is to be placed on A so that the system is to be in equilibrium

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a

2 kg

b

1 kg

c

3 kg

d

4 kg

answer is C.

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Detailed Solution

mg−T=0

T=2g

T−f=0

T=μN

2g=μ(3+x)g

2=0.5(3+x)

4=3+x

x=1kg

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