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- Mar 8, 2008
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Argh--will edit my above post in a second. It's missing some text and Bladeforums is timing out for me when I try to edit it.
Edit: It's still not letting me do it, and for some strange reason it seems tied to the specific text. I'm able to post other stuff, just not that paragraph, and despite tweaking it it's still not working. Let's try rephrasing it from scratch.
If you take a flying saucer shape--a disc with a bulge in the middle--and pinch it along its rim between your forefinger and thumb, it will drop so that its center of gravity (in the central bulge) is pointing straight down. The line between your pinched point and the center of gravity is describing your axis of rotational balance. If you rotate the object, it will want to do so around that axis. If you then grip another point along the rim, it once again will suspend itself in such a way that it describes an axis of rotational balance. This works with asymmetric objects as well, and if you shifted that central bulge off to one side, you'd still see the same behavior, except the portions of the object on either side of the described axis would no longer be symmetrical. You could then use this method to figure out approximately where the new center of gravity was, as it would no longer be right in the middle of the bulge like it was when it was in the center. With axes that balance like a "T" we don't think about this effect much because any point you grip along the handle (usually with the exception of up near the shoulder) shares the same axis of rotational balance. However, the more off-axis (relative to the primary grip point) the length of the handle is, the more observable this effect is.
Edit: It's still not letting me do it, and for some strange reason it seems tied to the specific text. I'm able to post other stuff, just not that paragraph, and despite tweaking it it's still not working. Let's try rephrasing it from scratch.
If you take a flying saucer shape--a disc with a bulge in the middle--and pinch it along its rim between your forefinger and thumb, it will drop so that its center of gravity (in the central bulge) is pointing straight down. The line between your pinched point and the center of gravity is describing your axis of rotational balance. If you rotate the object, it will want to do so around that axis. If you then grip another point along the rim, it once again will suspend itself in such a way that it describes an axis of rotational balance. This works with asymmetric objects as well, and if you shifted that central bulge off to one side, you'd still see the same behavior, except the portions of the object on either side of the described axis would no longer be symmetrical. You could then use this method to figure out approximately where the new center of gravity was, as it would no longer be right in the middle of the bulge like it was when it was in the center. With axes that balance like a "T" we don't think about this effect much because any point you grip along the handle (usually with the exception of up near the shoulder) shares the same axis of rotational balance. However, the more off-axis (relative to the primary grip point) the length of the handle is, the more observable this effect is.
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