Discussion
The property by which a gyroscope keeps its axis fixed relative to inertial space is called __________.
Answer: D
Correct answer: rigidity in space
Rigidity in space is the tendency of a spinning rotor to maintain its axis fixed relative to inertial space unless an external torque acts.
It is what makes a gyroscope useful as a reference, and it follows from the conservation of angular momentum. Precession is the response to a torque rather than the resistance to one; erection is the system that holds a gyro to the local vertical; and nutation is a small oscillation superimposed on precession.
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