Mathematics 9709 · AS & A Level · Forces and equilibrium

Forces and equilibrium — practice question

A block is driven across a horizontal floor by a force of magnitude $50\,\text{N}$ acting at an angle of $20^\circ$ to the horizontal (see diagram). The coefficient of friction between the block and the floor is $0.3$. Since the block moves with constant speed,
(main)[5]

determine the mass of the block.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: Normal reaction force: $R = mg + 50\sin 20$

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