The rotor of an electric motor has rotational inertia Im 2.0 103 kg m2 about its central

Chapter 11, Problem 50

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The rotor of an electric motor has rotational inertia Im 2.0 103 kg m2 about its central axis. The motor is used to change the orientation of the space probe in which it is mounted. The motor axis is mounted along the central axis of the probe; the probe has rotational inertia Ip 12 kg m2 about this axis. Calculate the number of revolutions of the rotor required to turn the probe through 30 about its central axis. 51

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