Newton's Laws

Certainly one of the greatest scientists who ever lived, Isaac Newton (1642-1727) had a profound impact on astronomy, physics, and mathematics. Among his many achievements were the invention of the reflecting telescope the basic design behind all large telescopes used today; the invention of a branch of mathematics known as calculus, a critical tool used throughout science; the creation and explanation of his three laws of motion; and the development of the law of universal gravitation.



Newton's First Law of Motion:

An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.



Newton's Second Law of Motion:

Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).   F = M A



Newton's Third Law of Motion:

For every action there is an equal and opposite reaction.   F = -F

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