Ch 9.review and summery - Ch 9 Review & Summary Center of...

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Ch 9 Review & Summary Center of Mass The center of mass of a system of n particles is defined to be the point whose coordinates are given by (9-5) or (9-8) where M is the total mass of the system. Newton's Second Law for a System of Particles The motion of the center of mass of any system of particles is governed by Newton's second law for a system of particles, which is (9-14) Here is the net force of all the external forces acting on the system, M is the total mass of the system, and is the acceleration of the system's center of mass. Linear Momentum and Newton's Second Law For a single particle, we define a quantity called its linear momentum as (9-22) and can write Newton's second law in terms of this momentum: (9-23) For a system of particles these relations become (9-25,9-27) Collision and Impulse Applying Newton's second law in momentum form to a particle-like body involved in a collision leads to the impulse–linear momentum theorem: (9-31,9-32) where is the change in the body's linear momentum, and is the impulse due to the force exerted on the body by the other body in the collision: (9-30)
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If F avg is the average magnitude of
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This note was uploaded on 01/12/2012 for the course PHYSICS phy 280 taught by Professor Griffo during the Fall '07 term at Bergen Community College.

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Ch 9.review and summery - Ch 9 Review & Summary Center of...

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