Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 80.0 kg down a 60° 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 by friction as the sled moves 30.0 m along the hill. Enter to 3 significant figures Wfric -39.2 J (b) How much work is done by the rope on the sled in this distance? Hint: use Newton's second law to find the tension.

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Chapter7: Work, Energy, And Energy Resources
Section: Chapter Questions
Problem 8PE: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0°...
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(c) What is the work done by the gravitational force on the sled?
Enter to 3 significant figures
Wa
grav
(d) What is the work done by the normal force?
Enter to 3 significant figures
WN =
X
(e) What is the total work done?
Enter to 3 significant figures
Note: When adding work done by individual forces, DO NOT ROUND THE VALUES TO FIND THE
SUM.
W₁
J
X√ J
Sense-making: If the speed of the rescue sled & the victim is constant, what do you expect the
total work done on the rescue sled and the victim to be? Does your answer support the
prediction?
total
=
Transcribed Image Text:(c) What is the work done by the gravitational force on the sled? Enter to 3 significant figures Wa grav (d) What is the work done by the normal force? Enter to 3 significant figures WN = X (e) What is the total work done? Enter to 3 significant figures Note: When adding work done by individual forces, DO NOT ROUND THE VALUES TO FIND THE SUM. W₁ J X√ J Sense-making: If the speed of the rescue sled & the victim is constant, what do you expect the total work done on the rescue sled and the victim to be? Does your answer support the prediction? total =
1.
fric
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 80.0 kg down a 60°
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 by friction as the sled moves 30.0 m along the hill.
Enter to 3 significant figures
= -39.2
X
Wrope
60°
J
=
W
T
(b) How much work is done by the rope on the sled in this distance? Hint: use Newton's second law to
find the tension.
Enter to 3 significant figures
X√ J
Transcribed Image Text:1. fric Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 80.0 kg down a 60° 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 by friction as the sled moves 30.0 m along the hill. Enter to 3 significant figures = -39.2 X Wrope 60° J = W T (b) How much work is done by the rope on the sled in this distance? Hint: use Newton's second law to find the tension. Enter to 3 significant figures X√ J
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