A-LevelPhysicsForces, density and pressure9702/12 · Feb/Mar 2025 · Q131 Mark

The diagram shows a uniform plank XY of length 4.0 m and weight 300 N. [Figure 13.1] The plank rests on fixed supports at its ends X and Y. A child of weight 600 N stands in different positions on the plank. The support at end X exerts a force F vertically upwards on the plank. What is the magnitude of F when the child stands at X and when the child stands at Y?

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A600 0

B600 150

C750 0

D750 150

✓ Correct answer

D: 750 150

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Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2025 Paper 1 Variant 2, question 13.

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