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Ch. 3 & 4 Motion & Forces. I. Newton’s Laws of Motion. “If I have seen far, it is because I have stood on the shoulders of giants.” - Sir Isaac Newton (referring to Galileo). A. Newton’s First Law. Newton’s First Law of Motion
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Ch. 3 & 4Motion & Forces I. Newton’s Laws of Motion • “If I have seen far, it is because I have stood on the shoulders of giants.” • - Sir Isaac Newton • (referring to Galileo)
A. Newton’s First Law • Newton’s First Law of Motion • An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net force.
B. Newton’s Second Law • Newton’s Second Law of Motion • The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. F = ma
C. Newton’s Third Law • Newton’s Third Law of Motion • When one object exerts a force on a second object, the second object exerts an equal but opposite force on the first.