1. A tow rope, parallel to the water, pulls a water skier directly behind the boat with constant velocity for a distance of 65 m before the skier falls. The tension in the rope is 120 N. (a) Is the work done on the skier by the rope positive, negative, or zero? Explain. (b) Calculate the work done by the rope on the skier. 2. A rock of mass 6.00 kg falls a distance of 10.0 m. a. How much work does gravity do on the rock? B. Was this work positive or negative