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: $R = mg + 50\sin 20$” …