Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 14

An object is falling at a constant speed through a viscous liquid. FU is the upthrust on the object due to the liquid. WL is the weight of the liquid displaced by the object. WO is the weight of the object. Which equation must be correct?

1. AFU = WL
2. BFU = WO – WL
3. CFU = WO
4. DFU = WO + WL

As printed in the paper