Moment of Inertia of a Ring: Formula and Application

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SUMMARY

The moment of inertia (I) for a ring can be calculated by subtracting the moment of inertia of a disc with radius R from that of a disc with radius R + h. This additive property of moment of inertia is crucial for accurately determining the inertia of composite shapes. The thickness (t) of the ring does not directly affect the moment of inertia calculation in this context, as the focus remains on the inner and outer radii. Understanding this formula is essential for applications in physics and engineering involving rotational dynamics.

PREREQUISITES
  • Understanding of basic physics concepts, specifically rotational dynamics.
  • Familiarity with the moment of inertia and its significance in mechanics.
  • Knowledge of geometric properties of shapes, particularly rings and discs.
  • Ability to perform mathematical calculations involving subtraction of moments of inertia.
NEXT STEPS
  • Research the moment of inertia formulas for various geometric shapes, including discs and cylinders.
  • Learn about the applications of moment of inertia in engineering and physics problems.
  • Explore advanced topics such as composite bodies and their moment of inertia calculations.
  • Study the effects of thickness and material density on the moment of inertia in practical scenarios.
USEFUL FOR

Students, engineers, and physicists who are studying mechanics, particularly those focusing on rotational motion and the properties of materials.

getneotome
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Moment of Inertia

Hello community members,

Can anyone let me know, the moment of Inertia formula (I) for a ring with inner radius (R) and height (h). Thickness can be considered (t).

Awating response...

Kind regar
 
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Welcome to PF!

Hi getneotome! Welcome to PF! :smile:

Do you mean a ring with inner radius R and outer radius R + h?

If so, just remember that Moment of Inertia is always additive, so you can just subtract the Moment of Inertia of a disc of radius R from the Moment of Inertia of a disc of radius R + h. :smile:
 
Dear Community memebers,

Can anyone tell me the formula for Moment of Inertai (I) for a ring with inner radius of (R) and height (h) and thickness (t).

Awaiting response...

Kind regards..
 
Hi getneotome!

Thanks for the PM, but the idea is that you show us what you've done. :smile:
 
getneotome is this a problem you have to solve, or a result that you need for a problem that you have to solve?
 

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