A-LevelPhysicsForces, density and pressureMay/June 2012Paper 1 Q141 Mark
A ladder is positioned on icy (frictionless) ground and is leant against a rough wall. At the instant of release it begins to slide. Which diagram correctly shows the directions of the forces P, W and R acting on the ladder as it begins to slide?
AP is horizontal to the right, W is vertically downwards, R is vertically upwards.
BP is horizontal to the right, W is vertically downwards, R is directed upwards and to the left.
CP is horizontal to the right, W is vertically downwards, R is directed upwards and to the right.
DP is horizontal to the left, W is vertically downwards, R is directed upwards and to the left.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep