phy2048 lecture18

phy2048 lecture18 - Chapter 9 Center of Mass and Linear...

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9-1 What Is Physics?  9-2 The Center of Mass 9-3 Newton’s Second Law for a System of Particles 9-4 Linear Momentum 9-5 The Linear Momentum of a System of Particles 9-6 Collision and Impulse 9-7 Conservation of Linear Momentum 9-8 Momentum and Kinetic Energy in Collisions 9-9 Inelastic Collisions in One Dimension 9-10 Elastic Collisions in One Dimension 9-11 Collisions in Two Dimensions 9-12 Systems with Varying Mass: A Rocket Chapter 9: Center of Mass and Linear Momentum Chapter 9 Homework 1, 3, 10, 14, 18, 23, 36, 44, 49, 53, 60, 63
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Collisions in One Dimension Total linear momentum is conserved f f i i v m v m v m v m 2 2 1 1 2 2 1 1 + = + Elastic Collision Total kinetic energy is conserved ) ( or 2 1 2 1 2 2 2 2 1 2 1 1 2 1 2 2 2 2 1 2 1 1 2 1 f f i i f f i i v v v v v m v m v m v m - - = - + = + Inelastic Collision Total kinetic energy is not conserved Completely Inelastic Collision Two bodies move together after collision 02 2 01 1 f 2 1 cm f f2 f1 ) ( v m v m v m m v v v v + = + = = = elastic inelastic completely inelastic
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Elastic Collision ) ( 2 1
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