In this question, use g=9.8 m s−2g = 9.8 \text{ m s}^{-2}g=9.8 m s−2.
A robotic transport sled, SSS, is pulled across a rough horizontal factory floor.
A horizontal pulling force of magnitude PPP newtons acts on SSS.
SSS moves with a constant acceleration of 1.25 m s−21.25 \text{ m s}^{-2}1.25 m s−2.
SSS has a weight of 15.68 N15.68 \text{ N}15.68 N.
The only resistance force acting on SSS is due to friction.
The coefficient of friction between SSS and the floor is 0.30.30.3.
Find PPP.
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.