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Here is another look at the popular demonstration of the fan cart and what happens if you try to blow into your own sail. A great demonstration for Newton's 3rd law and balanced forces. I run a series of tests that show it is possible to move forward if blowing into a sail that is shaped correctly. In addition, a few added tests were tried from suggestions given in the previous video. I have intentionally tried to keep it’s explanation in simple terms for younger students since there are several higher level explanations already available from a variety of sources on the internet and here on youtube.