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9709 P41 - Jun 2013 - Q1
3977

A block is at rest on a rough horizontal plane. The coefficient of friction between the block and the plane is 1.25.

(i) State, giving a reason for your answer, whether the minimum vertical force required to move the block is greater or less than the minimum horizontal force required to move the block.

A horizontal force of continuously increasing magnitude \(P\) N and fixed direction is applied to the block.

(ii) Given that the weight of the block is 60 N, find the value of \(P\) when the acceleration of the block is 4 m s\(^{-2}\).

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