Problem 19. A bicyclist descends a steep hill having uniform slope. She does not pedal and applies only the rear brake. The rider and bicycle weigh 120 lb with center of gravity at point C. Is it possible to descend the hill with uniform speed, and if so, what brake force Q is needed? The coefficient of friction between the tire and pavement is 1.1, and between the brake pad and wheel rim is 0.7, a = 10º. Answer: Q= 16.03 lb. rear brake detail 13 in. 13 in. _wheel axle 14 in. 16 in. 20 in. 28 in. 14 in. B
Problem 19. A bicyclist descends a steep hill having uniform slope. She does not pedal and applies only the rear brake. The rider and bicycle weigh 120 lb with center of gravity at point C. Is it possible to descend the hill with uniform speed, and if so, what brake force Q is needed? The coefficient of friction between the tire and pavement is 1.1, and between the brake pad and wheel rim is 0.7, a = 10º. Answer: Q= 16.03 lb. rear brake detail 13 in. 13 in. _wheel axle 14 in. 16 in. 20 in. 28 in. 14 in. B
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Question
A bicyclist descends a steep hill having uniform slope. She does not pedal and applies only the rear brake. The rider and bicycle weigh 120lb with center of gravity at point c. Is it possible to descend the hill with uniform speed, and if so, what brake force Q is needed? The coefficient of friction between the tire and pavement is 1.1, and between the brake pad and wheel rim is 0.7, a= 10 .
Transcribed Image Text:Problem 19. A bicyclist descends a steep hill having
uniform slope. She does not pedal and applies only the rear
brake. The rider and bicycle weigh 120 lb with center of
gravity at point C. Is it possible to descend the hill with
uniform speed, and if so, what brake force Q is needed?
The coefficient of friction between the tire and pavement is
1.1, and between the brake pad and wheel rim is 0.7, a =
10º.
Answer: Q= 16.03 lb.
rear brake
detail
13 in.
13 in.
_wheel axle
14 in.
16 in.
20 in.
28 in.
14 in.
B
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