Motion
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Aristotle thought the natural state of an object was at rest. If you pushed an object and then no further force acted on it, it would quickly come to stop.
Galileo, however noticed that there were often other forces acting on objects, such as friction. The less friction there was, the further an object could travel after an initial force was applied.
Challenge
What would happen if you pushed an object and no friction or any other force was ever applied to it again?
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