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/sci/ - Science & Math


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4273635 No.4273635 [Reply] [Original]

Sup /sci/

What´s the moment of inertia of a hoop/ring ?

>> No.4273646
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4273646

shameless self-bump!

>> No.4273653

about what, a point, an axis, a plane?

>> No.4273656

about its center (perpendicular to it) or about its diameter?

off the top of my head its MR^2 about its center, but i forget the diameter one

>> No.4273658

about an axis perpendicular to its plane and passing through center it's

<div class="math">\sum m_{i}r_{i}^{2}=R^2\sum m_{i}=MR^2</div>

about the diameters its half of that

>> No.4273729

they must not have google in your nigger-country

>> No.4273742

>>4273729
they must not have brains or paper or pens there. I mean it's really hard to compute a simple integral to find the moment of inertia.