1. The problem statement, all variables and given/known data The motor of a ski boat generates an average power of 7.50 * 10^4 W when the boat is moving at a constant speed of 12 m/s. When the boat is pulling the skier at the same speed, the engine must generate an average power of 8.30 * 10^4 W. What is the tension in the tow rope that is pulling on the skier? 2. Relevant equations Average power = force * average speed Average power = change in energy/time Average power = Work/time 3. The attempt at a solution I tried setting up an equation: 8.30 * 10^4 W = F*12 m/s F = 83,000/12 N = 7 * 10^3 N which is wrong.