(a)[1]
Draw a diagram to show the forces acting on the block.
(b)[4]
Find $\mu$.
(c)[1]
Find the speed of the block once it has travelled $3\,\text{m}$ down the plane.
Mathematics 9709 · AS & A Level · Newton's laws of motion
Newton's laws of motion — practice question
A block of mass $8\,\text{kg}$ moves down a rough plane inclined at $30^\circ$ to the horizontal, and it begins from rest. The coefficient of friction between the block and the plane is $\mu$. The block accelerates uniformly down the plane at $2.4\,\text{m s}^{-2}$.
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