11 - 2D particle kinetics - Momentum, impulse, and conservation of momentum

11 - 2D particle kinetics - Momentum, impulse, and conservation of momentum

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2D Particle Kinetics – Impulse and Momentum (I) Momentum 22 2 , 2 x xy y x y pm p p m K m m υ υυ == = =+ = = G G (II) Impulse ( ) 2 1 For a single constant force: t t JF d J t t F = Δ G G GG (III) Impulse-momentum equation 12 1 2 1 2 1 1 For a single constanr force : xx x x x x yy y y 2 2 x x y y y y pJp m F t m m m Jm m m t J Fm += + Δ += ⇒ = + Δ = ⇒+ = G Example – Impact A 0.15 Kg baseball is traveling with a velocity of m/s just before impact with the bat. Immediately after the impact, the velocity of the baseball is detected to be m/s. When struck by the bat, the baseball is in contact with the bat for 5 ms. Find (a) the x - and y - components of the impulse by the bat on the baseball during impact, and (b) the x - and y - components of the average impact force by the bat on the baseball.
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This note was uploaded on 10/17/2009 for the course PHYS 2305 taught by Professor Tschang during the Spring '08 term at Virginia Tech.

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11 - 2D particle kinetics - Momentum, impulse, and conservation of momentum

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