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5) A motor is attached to a solid sphere of aluminum 25.0 cm in diameter. The...

5) A motor is attached to a solid sphere of aluminum 25.0 cm in diameter. The motor is used to accelerate the sphere from rest to a rotational rate of 1345 rpm in 12.4 seconds.

a) How many complete revolutions does the sphere make as it is sped up to its final rotational rate?

b) What torque does the motor need to supply in order to accomplish this?

c) How much energy was used to make the sphere turn in this manner?

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