![]() Correspondingly, angular momentum is inertia (a quantity incorporating mass, as you'll see below) times angular velocity. Momentum, in physics, is simply mass times velocity. On the surface, it seems absurd that scientists would equip such a sensitive instrument with suck a recklessly freewheeling (literally) component in the middle of it. It also tends to spin at extraordinary speeds – the gyroscopes on the Hubble Telescope, for example, spin at 19,200 rotations per minute, or 320 per second. It was noted above that the shaft or disk forming the center of the gyroscope tends to be heavy.
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