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Dec 19, 2021 at 18:18 comment added Zoey Kind of, yeah. At least have an estimation of a lower bound. The context is just estimating the speed of a character in a book who managed to move fast enough to blur and be untraceable to an ordinary human not that far from him. I am assuming around 10 feet just for ease.
Dec 19, 2021 at 18:10 comment added user315366 @Zoey you mean like estimating the speed of a fan blade by looking at it spinning? I'm but sure about this, there might be a way for doing this though...
Dec 19, 2021 at 15:59 comment added Zoey Sorry but I am not asking about a camera or images, I said that I am doing it for a person. I also don't have a visual, I am just wondering a lower estimation for velocity to appear as a blur within the area of a few feet (perhaps around 10) to a human.
Dec 18, 2021 at 20:54 history edited user315366 CC BY-SA 4.0
added 292 characters in body
Dec 18, 2021 at 20:33 history answered user315366 CC BY-SA 4.0