A-LevelPhysicsForces, density and pressure9702/12 · May/June 2017 · Q121 Mark

A uniform beam is pivoted at P as shown. Weights of 10 N and 20 N are attached to its ends. The length of the beam is marked at 0.1 m intervals. The weight of the beam is 100 N. At which point should a further weight of 20 N be attached to achieve equilibrium? [Figure shows a beam pivoted at P. A 10N weight is at the left end (0.1m from P), and a 20N weight is at the right end (0.4m from P). Points A, B, C, D are marked along the beam.]

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✓ Correct answer

D: D

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Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2017 Paper 1 Variant 2, question 12.

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