Gyroscope Precession

Gyroscope Precession simulates a symmetric heavy top using the exact Euler-angle equations on a fixed pivot. Students set the spin rate, the starting tilt and a nutation value, and can trace the tip of the axis. Readouts show average precession, the slow-precession formula, the minimum and maximum tilt and the spin. It shows why a spinning object turns sideways under gravity's torque, and how faster spin means slower precession. Best suited to older students studying angular momentum and torque.

• Turn Trace axis tip on and watch the path the axis draws.
• Raise Spin rate and compare Precession (average) with the formula readout.
• Set Nutation to 1 and then 0 and compare the bobbing of the axis.
• Change Start tilt and read the Tilt min and max range.
• Check that doubling the spin roughly halves the precession rate.

1. 1Describe precession as the axis turning in response to torque.
2. 2Relate precession rate to spin rate qualitatively.
3. 3Distinguish precession from nutation.
4. 4Connect angular momentum to why a spinning top stays upright.

Questions teachers ask