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    Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0ºsize 12{"60" "." 0°} {} slope at constant speed, as shown in Figure. The coefficient of friction between the sled and the snow is 0.100.

    (a) How much work is done by friction as the sled moves 30.0 m along the hill?

    (b) How much work is done by the rope on the sled in this distance?

    (c) What is the work done by the gravitational force on the sled?

    (d) What is the total work done?A rescue sled and victim are lowered down a steep slope.


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