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# Ex_jp-com - Impulse and momentum p = m px = m x p y = m y 2...

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Impulse and momentum 2 22 , and 2 For a single constant force: xx yy xy pm p m p m p pm m K m JF d t J Ft υ υυ =⇒ = = == + = = Δ G G GG G G Impulse-momentum equation 12 1 2 1 2 1 1 For a single constanr force: x x y y 2 2 x x x y pJp m Jm m m F t m m F t m x y += += ⇒ + 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. ˆ 40 5 i −− ˆ j ˆ j ˆ 55 25 i + ( Ans : (a) J x = 14.25 Ns, J y = 4.5 Ns (b) F x = 2850 N,
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