Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 86.3 kg, down a 68.6° slope at constant speed, as shown in the figure. The coefficient of friction between the sled and the snow is 0.100. W T 60° (a) How much work is done (in J) by friction as the sled moves 30 m along the hill? (b) How much work is done (in J) by the rope on the sled in this distance? J (c) What is the work done (in J) by gravity on the sled? J (d) What is the total work done (in J)? J

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