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Homework Help: Impulse ?

  1. Jun 3, 2007 #1
    Two forces produce equal impulses but the second force acts for a time twice that of the first force. Which force, if either is larger?

    I derived it using the formula but not too sure if this is the right soultion

    Ft = impulse
    Impulse are the same for the two forces so let impulse = 100N.s
    let time = 10s
    Ft= 100
    F(10) = 100
    F = 10N

    F(2t) = 100
    F(20) = 100
    F = 5N
    therefore the first force is larger
    Is that the right approach?
  2. jcsd
  3. Jun 3, 2007 #2
    sure but if you wanted do it more rigorously

    [tex]F_1t=I=F_22t \therefore \frac{F_1}{F_2}=\frac{2}{1}[/tex]
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