A force of 64 N is required to keep a model power boat moving at a constant speed through the water on a pond. How much work is done in moving the model power boat a distance of 25 m?
You should be familiar with the formula
Work = Force x Distance
Wih Force in Newtons (kg*m/s^2)and Distance in meters, the Work that you compute will be in Joules (kg*m^2/s^2).