Moment of inertia disk
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Print two of these and fill with 16 mm ball bearings to demonstrate the moment of inertia.
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- Physics & Astronomy
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I designed these disks to fit together, if you print two of them. They are designed to fit 16 mm ball bearings, which can be found on Amazon for cheap (also happens to be the same size my projectile launchers use). The center hole is ¼ inch, for you to add an axel. Very good demo for moment of inertia, or print a bunch and use them as a lab. Students like playing with them.
I should note, the moment of inertia about the rim of the disks does not change large enough in order to make the rolling along the rim noticeable.
Here is a link to a document I made if you want to make these for a lab.
You will want to print them with low infill, 5-10% Honeycomb, and if you can, with 1 wall. I printed some in ABS, which is a good bit lighter than PLA or PETG. If you can print them in ABS or ASA, they would be preferred.
EDIT: I have modified the model so that it closes without a gap. I am also going to try printing with PLA lightweight when it arrives.