A student holds a bike wheel and starts it spinning with an initial angular speed of 9.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10.0 s period following the inital spin, the bike wheel undergoes 77.5 complete rotations. Assuming the frictional torque remains constant, how much more time At, will it take the bike wheel to come to a complete stop? Ats S The bike wheel has a mass of 0.825 kg and a radius of 0.385 m. If all the mass of the wheel is assumed to be located on the rim, find the magnitude of the frictional torque t; that was acting on the spinning wheel. Tf = N.m
A student holds a bike wheel and starts it spinning with an initial angular speed of 9.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10.0 s period following the inital spin, the bike wheel undergoes 77.5 complete rotations. Assuming the frictional torque remains constant, how much more time At, will it take the bike wheel to come to a complete stop? Ats S The bike wheel has a mass of 0.825 kg and a radius of 0.385 m. If all the mass of the wheel is assumed to be located on the rim, find the magnitude of the frictional torque t; that was acting on the spinning wheel. Tf = N.m
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter6: Uniform Circular Motion And Gravitation
Section: Chapter Questions
Problem 16PE: Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians...
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Concept explainers
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
Question
![A student holds a bike wheel and starts it spinning with an
initial angular speed of 9.0 rotations per second. The wheel is
subject to some friction, so it gradually slows down. In the
10.0 s period following the inital spin, the bike wheel
undergoes 77.5 complete rotations.
Assuming the frictional torque remains constant, how much
more time At, will it take the bike wheel to come to a
complete stop?
Ats
S
The bike wheel has a mass of 0.825 kg and a radius of
0.385 m. If all the mass of the wheel is assumed to be located
on the rim, find the magnitude of the frictional torque t; that
was acting on the spinning wheel.
Tf =
N.m](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1dd80890-34f3-42a2-96e7-3fec6dc24d2c%2Fd34c4987-1e3b-4b1d-b997-f0ebab1b89e5%2Fkz12uso_processed.png&w=3840&q=75)
Transcribed Image Text:A student holds a bike wheel and starts it spinning with an
initial angular speed of 9.0 rotations per second. The wheel is
subject to some friction, so it gradually slows down. In the
10.0 s period following the inital spin, the bike wheel
undergoes 77.5 complete rotations.
Assuming the frictional torque remains constant, how much
more time At, will it take the bike wheel to come to a
complete stop?
Ats
S
The bike wheel has a mass of 0.825 kg and a radius of
0.385 m. If all the mass of the wheel is assumed to be located
on the rim, find the magnitude of the frictional torque t; that
was acting on the spinning wheel.
Tf =
N.m
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