Centrifuges do not weigh more when spinning, as their mass and weight remain constant. The discussion clarifies that while spinning increases total stress-energy-momentum, this results in only a negligible weight change. Gyroscopes also do not lose mass when they spin; instead, they resist tilting rather than gravity. The mention of Laithwaite highlights that his experiments suggested reduced weight, but this can be attributed to aerodynamic factors rather than actual mass loss. Overall, the conversation emphasizes the distinction between mass, weight, and the effects of rotational motion.
