A-LevelPhysicsForces, density and pressure9702/12 · May/June 2025 · Q151 Mark

A square shop sign of uniform density has mass 2.4 kg and sides of length 0.86 m. The sign is supported by a hinge along its top edge. There is friction in the hinge so that the sign hangs from it in equilibrium at an angle of 15° to the vertical, as shown. [Diagram shows a sign hinged at the top, hanging at 15° to the vertical, with length 0.86 m shown.] What is the moment about the hinge of the weight of the sign?

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A2.6 Nm

B4.0 Nm

C5.2 Nm

D9.8 Nm

✓ Correct answer

A: 2.6 Nm

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Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2025 Paper 1 Variant 2, question 15.

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