Before Newton, Aristotle claimed that things have natural places they want to be and natural ways they want to move, but Newton replaced this with the principle that objects not acted upon by force continue in straight lines at constant velocity, and those acted upon by force follow equations of motion.
factualpending
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Sean CarrollEvidence Quote
“Before Newton, there was Aristotle... Newton says something completely different. He says if something is not acted on by a force, it's going to continue in a straight line at a constant velocity forever.”
Created: 8/11/2026, 7:47:10 AM
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