A-LevelPhysicsForces, density and pressure9702/12 · Feb/Mar 2024 · Q171 Mark
The diagram shows four forces acting on a circular disc. [Figure showing a circular disc with four forces F acting] Each force has magnitude F. Two of the forces act vertically and the other two forces act horizontally. All four forces act in the same plane as the disc. No other forces act on the disc. The disc has diameter d. Which statement is correct?
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.
AThe disc is in equilibrium because the resultant force is zero.
BThe disc is not in equilibrium because the resultant force is 4F.
CThe disc is in equilibrium because the resultant torque is zero.
DThe disc is not in equilibrium because the resultant torque is 2Fd.
✓ Correct answer
D: The disc is not in equilibrium because the resultant torque is 2Fd.
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