An automobile traveling 70.0 km/h has tires of 64.0 cm diameter. (a) What is the angular speed of the tires about their axles? (b) If the car is brought to a stop uniformly in 25.0 complete turns of the tires, what is the magnitude of the angular acceleration of the wheels? (c) How far does the car move during the braking? (Note: automobile moves without sliding)

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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An automobile traveling 70.0 km/h has tires of 64.0 cm diameter. (a) What is the angular speed of the tires about their axles? (b) If the
car is brought to a stop uniformly in 25.0 complete turns of the tires, what is the magnitude of the angular acceleration of the wheels?
(c) How far does the car move during the braking? (Note: automobile moves without sliding)
(a) Number
i
Units
(b) Number
i
Units
(c) Number
i
Units
Transcribed Image Text:An automobile traveling 70.0 km/h has tires of 64.0 cm diameter. (a) What is the angular speed of the tires about their axles? (b) If the car is brought to a stop uniformly in 25.0 complete turns of the tires, what is the magnitude of the angular acceleration of the wheels? (c) How far does the car move during the braking? (Note: automobile moves without sliding) (a) Number i Units (b) Number i Units (c) Number i Units
The angular momentum of a flywheel having a rotational inertia of 0.136 kg-m2 about its central axis decreases from 3.00 to 0.750
kg-m2/s in 1.80 s. (a) What is the magnitude of the average torque acting on the flywheel about its central axis during this period? (b)
Assuming a constant angular acceleration, through what angle does the flywheel turn? (c) How much work is done on the wheel? (d)
What is the magnitude of the average power done on the flywheel?
(a) Number
i
Units
(b) Number
Units
(c) Number
i
Units
(d) Number
Units
>
Transcribed Image Text:The angular momentum of a flywheel having a rotational inertia of 0.136 kg-m2 about its central axis decreases from 3.00 to 0.750 kg-m2/s in 1.80 s. (a) What is the magnitude of the average torque acting on the flywheel about its central axis during this period? (b) Assuming a constant angular acceleration, through what angle does the flywheel turn? (c) How much work is done on the wheel? (d) What is the magnitude of the average power done on the flywheel? (a) Number i Units (b) Number Units (c) Number i Units (d) Number Units >
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