PHYS171_f11_lecture_31

# PHYS171_f11_lecture_31 - Example from Star Trek Chapter 9...

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PHYS171 Prof. Arthur La Porta Rm 1111, IPST building (building #085) Chapter 9 Contrast of Energy and Momentum 43 42 1 r r Impulse = Δ f i t t dt F p Energy results from force acting over a certain distance. Momentum results from force acting over a certain time 43 42 1 r r Work = Δ f i x x s d F E ( ) ( ) initial final = p p r r A A A v m p r r = Definition of momentum Conservation law (closed system)

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Unformatted text preview: Example from Star Trek Chapter 9 Problem A mass m 1 is at rest and is hit by a mass m 2 moving at speed v, where m 1 =10kg, m 2 =20kg and v=3m/s. The mass m 2 has a piece of chewing gum stuck to it so that the masses stick together after the collision. How fast are the masses going after the collision? m 1 m 2...
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PHYS171_f11_lecture_31 - Example from Star Trek Chapter 9...

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