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cpalabamagirl2595
05.12.2019 •
Physics
A800-gram grinding wheel 27.0 cm in diameter is in the shape of a uniform solid disk. (we can ignore the small hole at the center.) when it is in use, it turns at a constant 245 rpm about an axle perpendicular to its face through its center. when the power switch is turned off, you observe that the wheel stops in 50.0 s with constant angular acceleration due to friction at the axle?
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Ответ:
Explanation:
d = Diameter of wheel = 27 cm
r = Radius =![\frac{d}{2}=\frac{27}{2}=13.5\ cm](/tpl/images/0404/1339/24ee2.png)
m = Mass of wheel = 800 g
Equation of rotational motion
Moment of inertia is given by
Torque is given by
The torque the friction exerts is -0.0037406448 Nm
For more information on torque and moment of inertia refer
Ответ: