A-LevelPhysicsForces, density and pressureOct/Nov 2025Paper 1 Q161 Mark
On Earth, a solid object that is fully submerged in a liquid experiences an upthrust U_E. On Mars, the same object, fully submerged in the same liquid, experiences an upthrust U_M. The acceleration of free fall on Mars is 3.7 ms⁻². Assume that the liquid's density and the object's volume have the same values on Earth and Mars. What is the ratio U_M / U_E?
A0.38
B1.0
C2.7
D3.6
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The correct answer is A. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
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