Question 12
In this question use g=9.8g = 9.8g=9.8 m s−2^{-2}−2.
A uniform rod AB AB\,AB of mass 10 kg and length 6 m rests in equilibrium with the end A A\,A on rough horizontal ground. The rod rests on a smooth peg at the point CCC, where AC=4AC = 4AC=4 m.
The angle between AB AB\,AB and the ground is θ\thetaθ, where tanθ=0.4\tan\theta = 0.4tanθ=0.4. The rod is on the point of slipping.
Find the coefficient of friction between the rod and the ground.
3.4 Forces Questions
87 exam-style questions on OCR (MEI) A Level Maths 3.4 Forces, covering 3.4.1 Language relating to forces, 3.4.2 Acceleration due to gravity, 3.4.3 Identify forces and draw force diagrams, 3.4.4 Resultant of concurrent forces, 3.4.5 Equilibrium of a particle, 3.4.6 Resolve a force into components (A-level only), 3.4.7 Equilibrium condition for resultant zero (A-level only), 3.4.8 Forces in equilibrium sum to zero (A-level only), 3.4.9 Equations for a particle in equilibrium (A-level only), 3.4.10 Frictional force and normal contact force (A-level only), 3.4.11 Model friction with F ≤ μR (A-level only), and 3.4.12 Apply Newton's Laws to friction problems (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.