Moments | OCR A A-Level Maths | 40 Worked Examples (H240)

40 exam-style questions on Moments 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 equilibrium conditions (zero resultant force and zero resultant moment), and OCR’s M/A/B/SC mark codes rather than another board’s. Questions ramp in difficulty from Easy (moment of a single force, force at an angle, seesaw and simple beam balance) through Standard (reactions on beams under several loads, uniform and non-uniform rods, finding the centre of mass by moments, hinged rods held by strings, and the point-of-tilting condition where a support reaction drops to zero) to Challenging (ladders and rods resting against a smooth wall on rough ground, a rectangular lamina in limiting equilibrium, a freely suspended lamina, and ‘show that’ detailed-reasoning problems that combine moments with limiting friction). 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 beam, ladder and lamina questions. Ideal for revision, homework, or in-class modelling of full-method solutions.