Physics (AS & A Level) · Oct / Nov 2025 · Paper 13 · Question 19

A sailboat is pushed by the wind at a constant velocity v across a lake. The force of the wind and the velocity of the sailboat are in the same direction. Which additional information is required to determine the work done per unit time by the wind acting on the sailboat?

1. Athe force exerted by the wind
2. Bthe distance travelled by the sailboat per unit time
3. Cthe total energy input to the sailboat by the wind
4. Dthe weight of the sailboat

As printed in the paper