A student holds a bike wheel and starts it spinning with an initial angular speed of 7.0 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 60.0 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 The bike wheel has a mass of 0.725 kg and a radius of 0.315 m. If all the mass of the wheel is assumed to be located on the rim, find the magnitude of the frictional torque tf that was acting on the spinning wheel. Tf =

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A student holds a bike wheel and starts it spinning with an
initial angular speed of 7.0 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 60.0 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 =
The bike wheel has a mass of 0.725 kg and a radius of
0.315 m. If all the mass of the wheel is assumed to be located
on the rim, find the magnitude of the frictional torque tf that
was acting on the spinning wheel.
Tf =
N. m
Transcribed Image Text:A student holds a bike wheel and starts it spinning with an initial angular speed of 7.0 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 60.0 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 = The bike wheel has a mass of 0.725 kg and a radius of 0.315 m. If all the mass of the wheel is assumed to be located on the rim, find the magnitude of the frictional torque tf that was acting on the spinning wheel. Tf = N. m
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