A sailboat is driven by the wind at a steady velocity $v$ across a lake. The wind force and the sailboat’s velocity act in the same direction. Which further piece of information is needed in order to determine the rate at which the wind does work 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