A-LevelPhysicsForces, density and pressure9702/12 · Feb/Mar 2022 · Q131 Mark

A rigid sphere is held at rest on the sea bed. When the sphere is released, it rises to the surface of the sea. The seawater has a uniform density. Which statement about the sphere, from its release until it reaches the surface, is correct?

AThe sphere always moves with constant acceleration.

BThe sphere always moves with constant velocity.

CThe upthrust on the sphere always decreases.

DThe upthrust on the sphere is always constant.

✓ Correct answer

D: The upthrust on the sphere is always constant.

Oracle Prep sorts past-paper questions by topic, so you can drill Forces, density and pressure and see which topics are most likely to come up next.

Topic: Forces, density and pressure, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2022 Paper 1 Variant 2, question 13.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content