A-LevelPhysicsForces, density and pressureOct/Nov 2010Paper 1 Q121 Mark
A spanner is used to tighten a nut as shown. [Figure showing a spanner applying a force F = 200 N at a distance of 0.25 m from the nut. The nut has a radius of 0.04 m, but the force is applied at the end of the spanner.] A force F is applied at right-angles to the spanner at a distance of 0.25 m from the centre of the nut. When the nut is fully tightened, the applied force is 200 N. What is the resistive torque, in an anticlockwise direction, preventing further tightening?
A8 N m
B42 N m
C50 N m
D1250 N m
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The correct answer is C. 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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