Physics (AS & A Level) · Oct / Nov 2019 · Paper 13 · Question 16

A steel ball is falling at constant speed in oil. Which graph shows the variation with time of the gravitational potential energy $E_p$ and the kinetic energy $E_k$ of the ball?

1. AGraph A: $E_p$ decreasing curve, $E_k$ constant horizontal line
2. BGraph B: $E_p$ decreasing straight line, $E_k$ constant horizontal line
3. CGraph C: $E_p$ decreasing curve, $E_k$ increasing curve
4. DGraph D: $E_p$ decreasing straight line, $E_k$ increasing straight line

As printed in the paper