A-LevelPhysicsForces, density and pressure9702/12 · May/June 2012 · 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?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
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
B: P is horizontal to the right, W is vertically downwards, R is directed upwards and to the left.
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