student holds a bike wheel and starts it spinning with an initial angular speed of 9.09.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10.0 s10.0 s period following the inital spin, the bike wheel undergoes 80.080.0 complete rotations. Assuming the frictional torque remains constant, how much more time Δts will it take the bike wheel to come to a complete stop? 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 ?f that was acting on the spinning wheel.
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.
A student holds a bike wheel and starts it spinning with an initial angular speed of 9.09.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10.0 s10.0 s period following the inital spin, the bike wheel undergoes 80.080.0 complete rotations.
Assuming the frictional torque remains constant, how much more time Δts will it take the bike wheel to come to a complete stop?
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 ?f that was acting on the spinning wheel.
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