Friction and Inclined Planes | OCR A A-Level Maths | 40 Worked Examples (H240)

40 exam-style questions on Friction and Inclined Planes for OCR A A-Level Mathematics (H240, Paper 3 Mechanics), each with a fully worked, mark-scheme-annotated solution. The pack is calibrated to OCR’s own conventions: g = 9.8 m/s (per the exam rubric), the provided F <= muR friction law, and OCR’s M/A/B/SC mark codes rather than another board’s. Questions ramp in difficulty from Easy (limiting friction on horizontal ground and simple slopes, the tan(alpha) = mu slipping condition) through Standard (resolving parallel and perpendicular to the plane, forces at an angle, dynamics up and down a rough slope with SUVAT) to Challenging (two-condition elimination problems, a horizontal force applied to a block on an incline, and least-force-at-the-angle-of-friction optimisation). Every worked solution breaks the method into one atomic step per line, with a plain-English note on each line and the exam mark folded in only where the real mark scheme rewards it. Free-body diagrams are drawn inline for the inclined-plane questions. Ideal for revision, homework, or in-class modelling of full-method solutions.