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A grinding wheel is in the form of a uniform solid disk of radius 6.93 cm and mass 1.97 kg. It starts from rest and accelerates uniformly under the action of the constant torque of 0.609 N · m that the motor exerts on the wheel.
(a) How long does the wheel take to reach its final operating speed of 1 110 rev/min?
s
(b) Through how many revolutions does it turn while accelerating?
rev
At time a grinding wheel has an angular velocity of 22. It has a constant angular acceleration of 28.0 until a circuit breaker trips at time = 1.60 . From then on, the wheel turns by an angle of 438 as it coasts to a stop at constant angular decel..
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