Mathematics 9709 · AS & A Level · Forces and equilibrium

Forces and equilibrium — practice question

A block with mass $400\,\text{kg}$ is in limiting equilibrium on level ground. A force of magnitude $2000\,\text{N}$ is applied to the block at an angle of $15^\circ$ to the upwards vertical.
(main)[5]

Determine the coefficient of friction between the block and the ground, correct to $2$ significant figures.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: Vertical equilibrium gives $R + 2000\cos 15^\circ = 400g$

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