COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 9, Problem 80QAP
To determine
The deformation angle
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Bicycle caliper brakes consist of rubber pads mounted in rigid metal "shoes." The normal force applied by a bicycle caliper
brake pad to the wheel rim is about 2.0 x 102 N. The contact area of the brake pad is approximately 4.0 cm x 0.90 cm, with the
long dimension parallel to the rim's rotation. The pad is 1.0 cm thick. The coefficient of kinetic friction between the rubber pad
and the aluminum rim is 0.50.
Given that the shear modulus of the rubber is 0.30 MPa,
calculate the deformation angle o of the brake pad.
An automobile tire is shown in the figure below. The tire is made of rubber with a uniform density of 1.10 x 10 ka/m, The tire can be modeled as consisting of two flat sidewals and a
tread region. Each of the sidewalls has an inner radius of 16.5 cm and an outer radius of 30.5 cm as shown, and a uniform thickness of 0.05 cm. The tread region can be approximated
as having a uniform thickness of 2.50 cm (that is, its inner radius is 30.5 cm and outer radius is 33.0 cm as shown) and a width of 16.0 cm. what is the moment of inertia (in kg -m) of
the tire about an axis perpendicular to the page through its center?
Sidewall
33.0 cm
16.5 cm
50.5 cm
Tread
kg- m2
An automobile tire is shown in the figure below. The tire is made of rubber with a uniform density of 10✕103 kg/m3. The tire can be modeled as consisting of two flat sidewalls and a tread region. Each of the sidewalls has an inner radius of 16.5 cm and an outer radius of 30.5 cm as shown, and a uniform thickness of 0.660 cm. The tread region can be approximated as having a uniform thickness of 2.50 cm (that is, its inner radius is 30.5 cm and outer radius is 33.0 cm as shown) and a width of 21.4 cm. What is the moment of inertia (in kg · m2) of the tire about an axis perpendicular to the page through its center?
Chapter 9 Solutions
COLLEGE PHYSICS
Ch. 9 - Prob. 1QAPCh. 9 - Prob. 2QAPCh. 9 - Prob. 3QAPCh. 9 - Prob. 4QAPCh. 9 - Prob. 5QAPCh. 9 - Prob. 6QAPCh. 9 - Prob. 7QAPCh. 9 - Prob. 8QAPCh. 9 - Prob. 9QAPCh. 9 - Prob. 10QAP
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