Teaching Physics with the Physics Suite

Edward F. Redish

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Why bother with N1?

Newton's first law states that an object will move with a constant velocity if nothing acts on it. This seems to contradict our everyday experience that all moving objects come to rest unless something acts on it to keep it going. Does our everyday experience contradict one of Newton's Laws? If it does not, explain the apparent contradiction. If it does, explain why we bother to teach Newton's first law anyway.

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Page last modified OCtober 8, 2002: D08