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Phone Book Friction #makereducation

8788056C 3BF9 4FCF A8488B2AA1C955B1 article

Another great lesson from Scientific American.

Sometimes friction can be annoying. It can make it difficult to push heavy things like furniture and it can even give you a nasty scrape if you fall. But friction is actually very important—without it, you could not move around at all, or even pick things up! Try this project to find out how friction can lead to some surprising effects—such as making it almost impossible to pull two books apart.

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