Q.

All the pulleys and strings are ideal and massless and the system shown is at rest. Now a force F = 4N is applied on the pulley shown. Then the frictional force acting between the blocks is
 

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a

3N

b

0N 

c

2N

d

1.96N

answer is D.

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Detailed Solution

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There is no tendency of slipping as acceleration of both the blocks are same in the absence of friction.

 f=0N    

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