Posted by Tzana on .
The motor of a ski boat generates an average power of 7.30 104 W when the boat is moving at a constant speed of 10 m/s. When the boat is pulling a skier at the same speed, the engine must generate an average power of 8.40 104 W. What is the tension in the tow rope that is pulling the skier?

Physics 
drwls,
The difference in power required from the motor. 1.1*10^4 W, is the towing work, which equals rope tension times velocity. Solve for the tension.