Physics (AS & A Level) · May / June 2023 · Paper 13 · Question 9

Two balls of identical shape and size but different masses are falling through the same liquid. The sum of the drag force and upthrust acting on each ball is equal to its weight. Which statement about the two balls is correct?

1. AThe heavier ball has a larger acceleration than the lighter ball.
2. BThe heavier ball has a smaller deceleration than the lighter ball.
3. CThe heavier ball is falling at the same speed as the lighter ball.
4. DThe heavier ball is falling at a larger speed than the lighter ball.

As printed in the paper