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 remains at in equilibrium on the point of sliding down the plane. The coefficient of friction between the block and the plane is 0.15.
Find the value of α\alphaα.
The block is now projected with speed 0.4 ms−1^{-1}−1 down a line of greatest slope of the plane. Describe the motion of the block, giving a reason for your answer.
Practise Edexcel A Level Maths Forces and Friction with exam-style questions for A Level Maths. 29 questions covering Resolving Forces, Inclined Planes, and Friction, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.