Explanation Given data: A person skids to a stop by hitting the brake on his back tire. Combined mass of the bike and the rider ( m ) is 80 kg. The distance skid by the person ( d ) is 40 cm. Coefficient of kinetic friction between the tire and the road surface ( μ kinetic ) is 0.80. Formula used: Refer to the equation (10.17) in the textbook, and modify the expression to find the thermal energy deposited in the tire and road surface as follows. Δ E thermal = f k d (1) Here, f k is the kinetic friction force, and d is the distance skid by the person. From the given data, write the expression for kinetic friction force as follows. f k = μ kinetic m g (2) Here, μ kinetic is the coefficient of kinetic friction between the tire and the road surface, m is the combined mass of the bike and the rider, and g is the acceleration due to gravity of the earth, which is 9.8 m s 2 . Explanation: Calculation of thermal energy deposited in the tire and road surface ( Δ E thermal ) : From equation (2), substitute ( μ kinetic m g ) for f k in equation (1), Δ E thermal = ( μ kinetic m g ) d Substitute 0

4th Edition

ISBN: 9780134700427

Author: Knight

Publisher: PEARSON

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Question

Chapter 10, Problem 30P

To determine

To find: The amount of thermal energy deposited in the tire and road surface.

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Chapter 10, Problem 29P

Chapter 10, Problem 31P

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Chapter 10 Solutions

COLLEGE PHYSICS - LCPO

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