PY 12-3 Please help with part (b) marked with red x, last chegg expert got wrong
ID: 1530511 • Letter: P
Question
PY 12-3
Please help with part (b) marked with red x, last chegg expert got wrong!
Note: Diagram indicates the angle is 60 degrees but it is actually 64 degrees as indicated in word problem.
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 6 64.0 slope at constant speed, as shown in the figure. 60 The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done (in J) by friction as the sled moves 30.0 m along the hill? 1159.93 (b) How much work is done (in J) by the rope on the sled in this distance? 2492.02 x J (c) What is the work done (in J) by gravity on the sled? 23782.1 (d) What is the total work done (in J)?Explanation / Answer
By law of conservation of energy
Work done(total) = work done(rope) + work done (gravity) + work done (friction)
WT = Wr+Wg+Wf
0 = Wr + 23782.1 – 1159.93
Wr = 22622.17 J
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