Problem 7: Rescue workers lower a sled and injured ice climber, with a combined mass of 95 kg, down a 60° slope at a constant speed as shown in the diagram. The coefficient of kinetic friction between the sled and the snow is 0.1. Suppose the sled is lowered 30 m along the hillside. a) How much work is done by friction as the sled/climber moves along the hill? b) How much work is done by the gravitational force as the sled/climber moves along the hill? c) How much work is done by the tension force in the rope as the sled/climber moves along the hill? d) What is the net work done on the sled/climber?
Problem 7: Rescue workers lower a sled and injured ice climber, with a combined mass of 95 kg, down a 60° slope at a constant speed as shown in the diagram. The coefficient of kinetic friction between the sled and the snow is 0.1. Suppose the sled is lowered 30 m along the hillside. a) How much work is done by friction as the sled/climber moves along the hill? b) How much work is done by the gravitational force as the sled/climber moves along the hill? c) How much work is done by the tension force in the rope as the sled/climber moves along the hill? d) What is the net work done on the sled/climber?
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 13CQ: “ E=K+Uconstant is a special case of the work energy theorem.” Discuss this statement.
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Transcribed Image Text:Problem 7: Rescue workers lower a sled and injured ice climber, with a
combined mass of 95 kg, down a 60° slope at a constant speed as
shown in the diagram. The coefficient of kinetic friction between the sled
and the snow is 0.1. Suppose the sled is lowered 30 m along the
hillside. a) How much work is done by friction as the sled/climber moves
along the hill? b) How much work is done by the gravitational force as
the sled/climber moves along the hill? c) How much work is done by the
tension force in the rope as the sled/climber moves along the hill? d)
What is the net work done on the sled/climber?
60°
W
T
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