1. A 195 Mg (megagram) train skids at a constant velocity south on a train track. The coefficient of kinetic friction between the steel wheels and steel track is 0.35. Determine the force of friction acting on the train. 2. A 1250 kg car slams on the brakes and skids on an icy road. If the car has to apply just over 562 N to get the car moving again, then 250 N to maintain a constant speed (assume air resistance is negligible), what are the coefficients of static and kinetic friction of the road?
1. A 195 Mg (megagram) train skids at a constant velocity south on a train track. The coefficient of kinetic friction between the steel wheels and steel track is 0.35. Determine the force of friction acting on the train. 2. A 1250 kg car slams on the brakes and skids on an icy road. If the car has to apply just over 562 N to get the car moving again, then 250 N to maintain a constant speed (assume air resistance is negligible), what are the coefficients of static and kinetic friction of the road?
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter5: Displacement And Force In Two Dimensions
Section: Chapter Questions
Problem 8STP
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1. A 195 Mg (megagram) train skids at a constant velocity south on a train track. The
coefficient of kinetic friction between the steel wheels and steel track is 0.35.
Determine the
2. A 1250 kg car slams on the brakes and skids on an icy road. If the car has to apply just
over 562 N to get the car moving again, then 250 N to maintain a constant speed
(assume air resistance is negligible), what are the coefficients of static and kinetic
friction of the road?
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