Moment of Inertia at a point away from centre of Mass.

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SUMMARY

The discussion centers on the concept of moment of inertia in relation to a point away from the center of mass, specifically using the analogy of a horse on a merry-go-round. It is established that while the horse moves faster at the edge, the moment of inertia is less due to the distribution of mass. The conversation highlights that as velocity increases, the distance from the center of mass decreases, aligning with the law of conservation of angular momentum. This indicates that the horse's position does not violate this fundamental law.

PREREQUISITES
  • Understanding of moment of inertia
  • Familiarity with angular momentum conservation
  • Basic physics of rotational motion
  • Knowledge of mass distribution in rotational systems
NEXT STEPS
  • Study the mathematical formulation of moment of inertia
  • Explore the principles of angular momentum in rotational dynamics
  • Investigate the effects of mass distribution on rotational speed
  • Learn about practical applications of rotational motion in engineering
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Physics students, educators, and anyone interested in understanding the principles of rotational dynamics and the conservation of angular momentum.

avito009
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Lets say we are sitting on a horse at the edge of a merry-go-round. You move faster relative to a point near the centre of the merry go round. Now most of the mass of this merry go round is at the edge i.e at the horse. So the moment of inertia at the horse is less. Correct me if I am wrong.
 
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Now we all know that the speed at the edge i.e at the Horse is more. Let's say the velocity is more at the Horse. If velocity increases the distance should decrease according to law of conservation of angular momentum. Doe this prove that the Horse is near the centre of mass and so does not violate the law of conservation of angular momentum?
 

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