On http://www.gyroscopes.org/1974lecture.asp during segment 8 (from 2:18) an experiment with a gyroscope is conducted. This is the clip of just that experiment The gyroscope apparently has less mass. Where can I find math to describe this effect? What is this effect called formally? Additionally, if this gyroscope were additionally orbiting in a circle with axis parallel to the gyro's axis of rotation, how would the effective centrifugal force of the gyro be calculated?