Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 100.0 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 (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 Wrope = √ J W = grav J (c) What is the work done by the gravitational force on the sled? Enter to 3 significant figures J (d) What is the work done by the normal force? WN= = J

University Physics Volume 1
18th Edition
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Author:William Moebs, Samuel J. Ling, Jeff Sanny
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Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 30P: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.00...
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(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.
W total
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?
Transcribed Image Text:(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. W total 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?
60°
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 100.0 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.
J
(a) How much work is done by friction as the sled moves 30.0 m along the hill.
Enter to 3 significant figures
Wfric
J
W
(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
Wrope
T
J
(c) What is the work done by the gravitational force on the sled?
Enter to 3 significant figures
W grav
(d) What is the work done by the normal force?
WN =
J
Transcribed Image Text:60° Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 100.0 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. J (a) How much work is done by friction as the sled moves 30.0 m along the hill. Enter to 3 significant figures Wfric J W (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 Wrope T J (c) What is the work done by the gravitational force on the sled? Enter to 3 significant figures W grav (d) What is the work done by the normal force? WN = J
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