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Newtons Laws of Motion

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-49

2025-11-01

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As a result of his investigation in mechanics, Sir Isaac Newton formulated the following laws:

1. Everybody tends to persevere in its state of rest or of uniform motion in a straight line, unless it is acted on by an impressed force.
2. Change of momentum is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
3. To every action there is always an equal and contrary reaction.