A rough plane is inclined to the horizontal at angle α\alphaα. A block of mass m m\,m kg is placed on the plane and remains in equilibrium at the point of sliding down the plane. The coefficient of friction between the block and the plane is 0.15
Verify that α=8.5∘\alpha=8.5^\circα=8.5∘.
The block is now projected with speed 0.4ms-1 down a line of greatest slope of the plane. Describe the motion of the block, giving a reason for your answer.
108 exam-style questions on Edexcel A Level Maths Forces and Friction, covering 5.1 Resolving Forces, 5.2 Inclined Planes, and 5.3 Friction. Each one has a worked solution and a mark scheme showing where the marks go.