A-LevelPhysicsForces, density and pressureOct/Nov 2019Paper 1 Q111 Mark
A rigid uniform bar of length 2.4 m is pivoted horizontally at its midpoint. [Figure showing a pivoted bar with 200 N weight at 0.8 m left and 300 N weight at 0.8 m right from the pivot] Weights are hung from two points on the bar as shown in the diagram. To maintain equilibrium, a couple is applied to the bar. What is the torque and direction of this couple?
A40 N m clockwise
B40 N m anticlockwise
C80 N m clockwise
D80 N m anticlockwise
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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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