A Gyroscope Has a Moment of Inertia of 0

question 81

Multiple Choice

A gyroscope has a moment of inertia of 0.14 kg*m² and an initial angular speed of 15 rad/s.Friction in the bearings causes its speed to reduce to zero in 30 s.What is the value of the average frictional torque?

• A)3.3 x 10^-2 N*m
• B)8.1 x 10^-2 N*m
• C)14 x 10^-2 N*m
• D)7.0 x 10^-2 N*m

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