PURPOSE: To demonstrate that the axis of rotation does not change when the net gravitational torque on the gyroscope is zero.
DESCRIPTION: The gyroscope will rest on the recessed end of the stand even when it is not spinning, because there is no net gravitational torque. To start it spinning, with one hand hold the collar near the end of the long rod, and twirl the rod with the other hand.
REFERENCES: (PIRA unavailable.)
EQUIPMENT: Gyroscope, stand and collar.
SETUP TIME: None.
Go back to Lecture-Demonstration Home Page.