Angular Momentum and the speed of light

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SUMMARY

The discussion centers on a thought experiment involving angular momentum and the effects of mass ejection on a spinning object, specifically a merry-go-round, as it approaches the speed of light. The participant posits that pushing off a large mass will increase angular acceleration due to a decrease in weight. However, they question the validity of their assumption, suggesting that only an infinite mass could achieve light-speed rotation. The conversation highlights the complexities of angular momentum in relativistic physics.

PREREQUISITES
  • Understanding of angular momentum principles
  • Familiarity with relativistic physics concepts
  • Knowledge of the effects of mass on rotational dynamics
  • Basic grasp of the theory of relativity and the speed of light
NEXT STEPS
  • Research the relationship between mass and angular momentum in rotating systems
  • Explore the implications of the theory of relativity on rotational motion
  • Study the concept of infinite mass and its theoretical implications in physics
  • Investigate how mass distribution affects the rotational speed of objects
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Physics students, educators, and enthusiasts interested in advanced concepts of angular momentum and relativistic effects on motion.

bassplayer142
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I composed a thought experiment that I'm not quite positive on. Say we have a merry go round or some spinning thing and we speed it up to near the speed of light. On this merry go round is a very big mass which we simply push off at this point. The decrease in weight will add to the angular acceleration.

My guess is that simply no matter how close you are the the speed of light the only weight that will make it spin at the speed of light is an infinite mass being pushed off. Is this right or am I missing something.
 
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bassplayer142 said:
On this merry go round is a very big mass which we simply push off at this point. The decrease in weight will add to the angular acceleration.
Why would pushing off the mass increase the speed of the merry go round?
 
I got my idea wrong. Try pushing the mass towards the center.:)
 

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