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When humanity first started studying motion, circles posed a peculiar puzzle. Why do planets sweep endlessly around the Sun without flying off into the void of space? Why does a stone swung on a ...

It's odd that I have talked about these forces so much. First, I talked about how centrifugal forces were not real and the difference between centrifugal and centripetal forces. Then I talked about ...

In this post, I am going to talk about real and not-real forces, like the fake centrifugal force. (If you don't like the word fake you could replace that with fictitious.) First, an example: Suppose ...

There are few experimental techniques that allow the study of force on biological molecules. Among them, optical or magnetic tweezers and atomic force microscopes (AFMs) have provided much insight ...