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Impulse and Force-Time Graph Problem

  1. Nov 24, 2009 #1

    jmm

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    1. The problem statement, all variables and given/known data
    09.EX05.jpg
    In the figure , what value of Fmax gives an impulse of 7.1 Ns


    2. Relevant equations
    1832c91daa867136732d31cc7c988eb0.png


    3. The attempt at a solution
    Impulse is the integral of force with respect to time which is the same the area under the force-time graph which is given by the area of the triangle: 0.5*Fmax*8s

    7.1 Ns = 4s * Fmax
    Fmax = 1.775 N

    However that's not the right answer. Where did I go wrong? Thanks!
     
  2. jcsd
  3. Nov 24, 2009 #2

    cepheid

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    Staff Emeritus
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    Gold Member

    The time axis is in milliseconds.
     
  4. Nov 24, 2009 #3

    jmm

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    Haha thanks! I never would've noticed that.
     
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