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Finding Work From Impulse

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  1. Mar 1, 2016 #1
    1. The problem statement, all variables and given/known data

    Consider the following two scenarios.
    (A) A pitcher throws a ball at -55m/s and the batter swims at 25m/s.
    (B) A pitcher throws a ball at -25m/s and the batter swings at 55m/s.
    The ball has a mass of 0.15kg and the bat has a mass of 1kg. Assume that the impact between the ball and the bat lasted for 0.3s, the coefficient of restitution was 0.5 and that the force of impact maintained a constant value throughout impact.

    Question a) For both scenarios: what impulse was exerted on the ball by the bat?
    Question b) For both scenarios: how much work was done on the ball by the bat?


    2. Relevant equations

    ΣFΔt=mΔv
    W=FΔd

    3. The attempt at a solution

    I thiiiink that I got question a)

    (A)
    ΣFΔt=mΔv
    ΣFΔt=(1)(25)
    ΣFΔt=25Ns

    (B)
    ΣFΔt=mΔv
    ΣFΔt=(1)(55)
    ΣFΔt=55Ns

    I am unsure of how to go from impulse to calculate work in question b).
     
  2. jcsd
  3. Mar 1, 2016 #2
    Never mind, I think I got it! Realized I did part a) wrong and was able to get b).
     
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