Why is it much easier to put a ring on a finger than to take it off?
In: Physics
Just the finger shape (if you’re asking this literally and not metaphorically). It’s the reason zip ties work. Your finger is a slightly squishy cylinder that is smaller at one end and becomes wider nearer the knuckle. The ring will slide down it, and over it (although you will feel more pressure at the knuckle). Afterwards, it rests on a smaller part. Then, you have to force it back over the knuckle with no gradual shape leading it there, like if you were to try to force a used zip tie open simply by pulling on it.
Also, there is a muscle that rests between where your ring rests and the knuckle, which, upon being put pressure on, scrunches up near the muscle, as you slide the ring closer. It takes a few moments and some more pressure both up and down and side to side to force that muscle back under the ring.
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