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Q.

In the arrangement shown, coefficient of friction between the block and the surface is 0.6 then 

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a

acceleration of the block is 1 m/s2

b

frictional force acting on the block is 10 N

c

acceleration of the block is 0.5 m/s2

d

frictional force acting on the block is 12 N

answer is D.

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Detailed Solution

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fmax=μN=μmg=0.6×2×10N=12N

since 10N<fmax, the block will be in equilibrium 

Hence frictional force acting on the block is 10 N.

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