5. You are dragging a 110 kg trunk across a floor at a consta velocity with a horizontal force of 380 N. T (a) Calculate the coefficient of kinetic friction. (b) A friend decides to help by pulling on the trunk with a force of 150 N [up]. Will this help? Calculate the force required to pull the trunk at a constant velocity to help you decide. (c) Instead of pulling on the trunk, your 55 kg friend just sits on it. What force is required keep the trunk moving at a constant velocity?

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter5: The Laws Of Motion
Section: Chapter Questions
Problem 29P: A 9.00-kg hanging object is connected by a light, in extensible cord over a light, frictionless...
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5. You are dragging a 110 kg trunk across a floor at a consta
velocity with a horizontal force of 380 N. T
(a) Calculate the coefficient of kinetic friction.
(b) A friend decides to help by pulling on the trunk with a
force of 150 N [up]. Will this help? Calculate the force
required to pull the trunk at a constant velocity to help
you decide.
(c) Instead of pulling on the trunk, your 55 kg friend just
sits on it. What force is required keep the trunk moving
at a constant velocity?
Transcribed Image Text:5. You are dragging a 110 kg trunk across a floor at a consta velocity with a horizontal force of 380 N. T (a) Calculate the coefficient of kinetic friction. (b) A friend decides to help by pulling on the trunk with a force of 150 N [up]. Will this help? Calculate the force required to pull the trunk at a constant velocity to help you decide. (c) Instead of pulling on the trunk, your 55 kg friend just sits on it. What force is required keep the trunk moving at a constant velocity?
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