Physics · May / June 2026 · Paper 12 · Question 15

It is dangerous for divers rising to the surface in a lake when the pressure decreases by more than 180000Pa in 1.0 minute. The density of water is 1000kg/m3. The gravitational field strength g is 9.8N/kg. What is the greatest speed at which divers may rise to the surface safely?

1. A0.31m/s
2. B3.0m/s
3. C18m/s
4. D29m/s

As printed in the paper