The rough surface of a horizontal table offers a definite maximum opposing force to initiate the motion of a block along with the table,

Monjur Alahi

The rough surface of a horizontal table offers a definite maximum opposing force to initiate the motion of a block along with the table, which is proportional to the resultant normal force given by the table. Forces F1 and F2 act at the same angle θ with the horizontal and both are just initiating the sliding motion of the block along with the table. Force F1 is a pulling force while the force F2 is a pushing force. F2 > F1, because

(A) Component of F2 adds up to weight to increase the normal reaction.

(B) Component of F1 adds up to weight to increase the normal reaction.

(C) Component of F2 adds up to the opposing force.

(D) Component of F2 adds up to the opposing force.


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Salim Ahmed Kawsar

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(A) Component of F2 adds up to weight to increase the normal reaction.

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