# Lecture-07 - Dynamics Dynamics NewtonsLaws Lecture#07 Ch.4....

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ynamics ewton’s Laws Dynamics – Newton s Laws Lecture #07 – Ch. 4. Physics 125–Fall 2010 Dr. Mike Melnichuk mmeln@umich.edu Office: 2409 Randall Lab phys125lecture@umich.edu ffice Hours: 2:00 :00 / Mon & Tue Rm 1416 Randall Lab Office Hours: 2:00 – 4:00 / Mon. & Tue. in Rm. 1416 Randall Lab.

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Force and Mass A FORCE is a push or a pull of one physical system on another physical system. There are contact forces (normal, tension and friction forces) and noncontact (action-at-a-distance) forces (gravitational force). INERTIA, which is measured by MASS, is the property of a physical system to maintain its state of uniform motion.
Newton’s Laws A physical system will tend to maintain its state of uniform motion or First Law (Law of Inertia): rest if the resultant (net) force acting on it is zero. e nd aw (Law of net Force and Accelera on): Se cond The vector sum of all the forces acting on an object is equal to the mass fth t bj tti it ( t ) l Law (Law of net Force and Accelera i F tion): ⎛⎞ G G all forces of that object times its (vector) acceleration F = ma . ⎜⎟ ⎝⎠ ACTION If a physical system ACTS on another physical system with a force F , e other system REACTS on the initial s tem

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## This note was uploaded on 12/08/2011 for the course PHYSICS 125 taught by Professor Unknown during the Fall '08 term at University of Michigan.

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Lecture-07 - Dynamics Dynamics NewtonsLaws Lecture#07 Ch.4....

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