Motion and Its Causes

Force and Newton’s Laws of Motion

What causes motion?

Between 500 B.C.E. and 1600 C.E. there were many other ideas developed about the causes of motion. Some said a stone fell because of the “weight of a stone,” supposing that weight is a property of the stone. Others, saying “the apple is attracted to Earth” supposed, like Aristotle (384–322 B.C.E.), that there is a desire of an object to move toward Earth. Others suggested that force is something that is transferred from one object to another, as discussed above. Still others, starting with Leonardo da Vinci (1452–1519), wrote that force was an external agent that exerted a push or a pull on a body.


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