Timeline for Are there different moments of inertia for shapes and bodies?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Feb 17, 2020 at 6:34 | answer | added | kamran | timeline score: 2 | |
| Feb 17, 2020 at 2:18 | comment | added | Phil Sweet | The connection is that in the second case M is = density * L * pi * r^2. So inertia = 1/2 * density * L * pi * r^4, or 1/2 * density * L * pi * d^4 / 16. They have different dimensional units but they scale similarly with r. | |
| Feb 17, 2020 at 2:04 | comment | added | Phil Sweet | Please get in the habit of calling the first type the second moment of area. The sanity you save may be your own. And have an upvote to mitigate the driveby downvote. I reckon I've seen tables labeled "inertia" that had ten different dimensional units attached. It's crazy. But each industry seems to have had its own canonical way of cookbooking inertial properties. Just make sure you know exactly how any tabulated inertial values are intended to be used. | |
| Feb 16, 2020 at 19:59 | comment | added | joojaa | @fibonatic yeah but still both called inertia. Theres no need to do that you know. Not all languages do. | |
| Feb 16, 2020 at 19:54 | comment | added | fibonatic | @joojaa other names for those two are area moment of inertia and mass moment of inertia (those can help a little to differentiate the two). | |
| Feb 16, 2020 at 19:29 | comment | added | joojaa | Look up first mpment of innertia and second moment. TBH english is a bit stupid in this regard | |
| Feb 16, 2020 at 18:48 | history | asked | user1477107 | CC BY-SA 4.0 |