A-LevelPhysicsForces, density and pressure9702/12 · Oct/Nov 2016 · Q151 Mark

A minimum torque of 20 N m must be applied to the lid of a jar for it to open. The radius of the lid is 4.0 cm. [Figure 15.1] What is the minimum force F that must act on each side of the lid in order to open it?

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A2.5 N

B5.0 N

C250 N

D500 N

✓ Correct answer

C: 250 N

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Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2016 Paper 1 Variant 2, question 15.

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