NewtonsLawsofMotion

# NewtonsLawsofMotion - NEWTONS LAWS OF MOTION Newtons Laws...

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1 NEWTON’S LAWS OF MOTION Newton’s Laws are the foundation of Classical (Newtonian) Mechanics. They were published by Isaac Newton in 1687 along with the law of gravitation in the Principia. They have far reaching applications/implications in every branch of science. Nonetheless, these laws have their limitations. They need to be modified when applied to objects moving near the speed of light or when applied to microscopic particles. As we will see Newton’s Laws are very simple to state but are NOT so simple to apply. Only with practice does one become better at learning to apply Newton’s Laws. Newton’s Laws are empirical laws, deduced from experiment; they cannot be derived from anything more fundamental! FIRST LAW A body at rest remains at rest and a body in uniform motion (constant velocity) remains in uniform motion unless it is acted on by a non-zero net (resultant) external force. Resultant Force – The vector sum of the forces acting on a body. 1 2 3 F = F + F + F + . ...... (Resultant Force) Ex. m F 1 F 1 F 1 1 2 3 F = F + F + F External Force – Forces exerted on a body by other bodies in the environment (surroundings) m m 1 m 2 m 3 F 1(ext) F 2(ext) F 3(ext)

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## This note was uploaded on 09/02/2011 for the course PHYS 2A taught by Professor Luna during the Fall '09 term at DeAnza College.

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NewtonsLawsofMotion - NEWTONS LAWS OF MOTION Newtons Laws...

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