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A solid disc is kept on a rough horizontal surface as shown in figure. A horizontal force is applied on the disc at point P as shown. Assuming sufficient force is there to prevent slipping,

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Friction force acts backward

Friction force acts forward

No friction force acts on the disc

Insufficient information to determine the direction of friction force.

answer is A.

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Detailed Solution

The applied force F produces an anticlockwise moment about the centre of mass C. Slipping can be prevented if the friction force produces clockwise moment about the centre of mass C. This is possible only when the friction force is backward.

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