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Q.

A cylinder is placed on a rough horizontal surface and a horizontal force F is acting on it as shown. The direction of frictional force acting on the cylinder is

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a

To the left

b

Either to the left or to the right

c

No frictional force is acting

d

To the right

answer is B.

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Detailed Solution

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Since the force is acting at the top of the cylinder, at the contact point, 'α R ' will be greater than acceleration of its centre of mass. This causes a tendency to side to the left

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