Physics, 07.04.2020 07:48 aprilstalder
Two spheres are each rotating at an angular speed of 25.8 rad/s about axes that pass through their centers. Each has a radius of 0.370 m and a mass of 1.43 kg. However, as the figure shows, one is solid and the other is a thin-walled spherical shell. Suddenly, a net external torque due to friction (magnitude = 0.260 N · m) begins to act on each sphere and slows the motion down. How long does it take (a) the solid sphere and (b) the thin-walled sphere to come to a halt?
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