A-LevelPhysicsForces, density and pressure9702/12 · Oct/Nov 2010 · Q131 Mark
The diagrams show a metal cube suspended from a spring balance before and during immersion in water. [Figure showing a spring balance suspending a metal cube. One diagram shows it before immersion, the other during partial immersion in water.] A reduction in the balance reading occurs as a consequence of the immersion. 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 balance reading will be further reduced if the cube is lowered further into the water.
BThe balance reading during immersion corresponds to the upthrust of the water on the cube.
CThe forces acting on the vertical sides of the cube contribute to the change in the balance reading.
DThe gravitational pull on the cube is unchanged by the immersion.
✓ Correct answer
D: The gravitational pull on the cube is unchanged by the immersion.
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