A sailboat moves across a lake at constant velocity $v$, driven by the wind. The wind force acts in the same direction as the sailboat’s motion. What other information is needed to calculate the work done per unit time by the wind on the sailboat?
- Athe force exerted by the wind
- Bthe distance travelled by the sailboat per unit time
- Cthe total energy input to the sailboat by the wind
- Dthe weight of the sailboat