A-LevelPhysicsForces, density and pressureMay/June 2025Paper 1 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?
A2.6 Nm
B4.0 Nm
C5.2 Nm
D9.8 Nm
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The correct answer is A. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
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