Physics (AS & A Level) · Oct / Nov 2025 · Paper 12 · Question 16

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 m s^-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?

1. A0.38
2. B1.0
3. C2.7
4. D3.6

As printed in the paper