Newton's law

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ppt
24.10.2018

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"Laws of Motion" redirects here. For other uses, see Laws of motion. "Newton's Law" redirects here. For the 2017 Australian TV series, see Newton's Law (TV series). First law: In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force. Second law: In an inertial reference frame, the vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration a of the object: F = ma. (It is assumed here that the mass m is constant – see below.) Third law: When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.

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Newton’s Law Newton’s Law

Newton’s Laws Newton’s Laws Newton’s First Law Law of Inertia Newton’s Second Law F = ma Newton’s Third Law Action Reaction Law of Universal Gravitation F  Gmm ' 2 r

MassMass …is measured in kilograms. …is the measure of the inertia of an object. Inertia is the natural tendency of a body resist changes in motion.

Force Force …the agency of change. …changes the velocity. …is a vector quantity. ...measured in Newton’s.

Newton’s First Newton’s First LawLaw Law of Inertia “A body remains at rest or moves in a straight line at a constant speed unless acted upon by a force.”

Newton’s Second Newton’s Second LawLaw The Sum of the Forces acting on a body is proportional to the acceleration that the body experiences F  a  F = (mass) a

Newton’s Third Newton’s Third LawLaw Action-Reaction For every action force there is an equal and opposite reaction force

The Law of The Law of Gravity Gravity every other mass. Every mass exerts a force of attraction on The math… F  Gmm ' 2 r G = 6.67  1011 N∙m2/kg2

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