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A gyroscope spinning at angular velocity of 250 r/s is used to start up a stalled...

A gyroscope spinning at angular velocity of 250 r/s is used to start up a stalled engine. If the gyroscope has a mass of 3.6 kg and is an annular disc of radii 10 cm and 15 cm, calculate the maximum rate of revolution at which the gyroscope can get the engine turning. Assume the moving engine parts act like a solid sphere of mass 25 kg and radius 12 cm.

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