Polar mass moment of inertia *and* simply moment of inertia

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SUMMARY

The discussion clarifies the difference between polar mass moment of inertia and simply moment of inertia, asserting that they are often used interchangeably without material distinction. However, it emphasizes that in the context of second moments of area, the polar moment of inertia has a specific definition and application. The conversation references the Wikipedia page on polar moment of inertia for further details.

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Swap123
Hi ,everyone…

i wanted to clear my one confusion ,that
what is actual difference between polar mass moment of inertia and simply moment of inertia…??
 
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Swap123 said:
Hi ,everyone…

i wanted to clear my one confusion ,that
what is actual difference between polar mass moment of inertia and simply moment of inertia…??

Polar moment of inertia and mass moment of inertia are sometimes used interchangeably. There is no material difference between the two.

In talking about second moments of area, the polar moment of inertia has a distinct definition and usage:

http://en.wikipedia.org/wiki/Polar_moment_of_inertia
 

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