A-LevelPhysicsForces, density and pressure9702/12 · Oct/Nov 2015 · Q151 Mark
Which pair of forces acts only as a couple on the circular object?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
ATwo forces F, one acting horizontally right at the top of the circle, the other acting horizontally left at the bottom of the circle.
BTwo forces, one F acting horizontally right at the top of the circle, the other 2F acting horizontally right at the bottom of the circle.
CTwo forces, one F acting horizontally right at the top of the circle, the other 2F acting horizontally left at the mid-left of the circle.
DTwo forces F, one acting horizontally right at the top of the circle, the other acting vertically downwards at the bottom of the circle.
✓ Correct answer
A: Two forces F, one acting horizontally right at the top of the circle, the other acting horizontally left at the bottom of the circle.
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