A-LevelPhysicsForces, density and pressure9702/12 · May/June 2011 · Q151 Mark

The diagrams all show a pair of equal forces acting on a metre rule. Which diagram shows forces that provide a couple and zero resultant force?

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ATwo equal and opposite forces applied at the same point on the rule, vertically.

BTwo equal and opposite forces applied at different points on the rule, perpendicular to the rule.

CTwo equal and opposite forces applied at different points on the rule, acting vertically.

DTwo equal forces applied at different points on the rule, parallel and in the same direction.

✓ Correct answer

B: Two equal and opposite forces applied at different points on the rule, perpendicular to the rule.

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Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2011 Paper 1 Variant 2, question 15.

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