Lect18-Phys172s11-(10.1-10.7-Collisions)

# Lect18-Phys172s11-(10.1-10.7-Collisions) - Spring 2011 PHYS...

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Unformatted text preview: Spring 2011 PHYS 172: Modern Mechanics Lecture 18 – Collisions Read 10.1 – 10.7 Spring 2010 PHYS 172: Modern Mechanics Chapter 10: Collisions www.tensionnot.com http://www.aolcdn.com 3 Elastic and inelastic collision ELASTIC COLLISION: the internal energy of the objects in the system does not change: Δ E int =0 INELASTIC COLLISION: the internal energy of the objects in the system changes: Δ E int = 0 MAXIMALLY INELASTIC COLLISION: Objects stick together – maximum energy dissipation 4 Momentum and impulse dp F dt = & & dp Fdt = & & 1 2 1 on p F t Δ = Δ & & Clicker: The changes in the momenta of orange and blue balls are: A)Equal in magnitude and direction B)Equal in magnitude, opposite in direction C)Larger in magnitude for the lighter small ball D)Smaller in magnitude for the lighter small ball ( ) 1 2 sys tot P P p p Δ = Δ = Δ + = & & & & 1 2 p p Δ + Δ = & & Conservation of momentum 1 p & 2 p & 2 1 2 on p F t Δ = Δ & & 5 Collisions: conservation of momentum During collision...
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Lect18-Phys172s11-(10.1-10.7-Collisions) - Spring 2011 PHYS...

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