Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 0 = 70.0 slope at constant speed, as shown in the figure. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done (in ]) by friction as the sled moves 30.0 m along the hill? 876.36 x J (b) How much work is done (in ]) by the rope on the sled in this distance? (c) What is the work done (in ]) by gravity on the sled? (d) What is the total work done (in J)? Additional Materials Reading