Physics
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A sphere initially at rest is spun in a circle at an angular acceleration α. The sphere's acceleration vector changes as a function of time. Determine the time when the angle between the radius and acceleration vector is θ degrees. Express t in terms of α and θ.
Calculate the total kinetic energy of a 7.5 kg soccer ball with a 9.1 cm radius that rolls without slipping down along a track at 3.9 m/s.