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Homework Help: Finding initial velocity

  1. Oct 13, 2008 #1
    1. The problem statement, all variables and given/known data
    two cars collide with eachother and basically go different directions
    m1 starts out going West and m2 starts out going North

    I have set sign conventions to have North + and West -
    East + and south -

    v1 and v2 are unknown but v1' and v2' are know v1'=19.4 m/s (57 N of W)
    v2'=11.4 m/s (44 N of W)

    masses are m1= 765 kg and m2=1100 kg i know that Pi=Pf
    equation for momentum

    cos law, sine law and tan law may be required due to angles

    i must figure out v1 and v2, the initial velocities for the cars
  2. jcsd
  3. Oct 14, 2008 #2


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    Welcome to PF!

    Hi poohead! Welcome to PF! :smile:

    Show us what you've tried, and where you're stuck, and then we'll know how to help. :wink:
  4. Oct 14, 2008 #3
    this is basically where im stuck, i don't know where to go from here. I drew a diagram labelling the angles and drew triangles so i could use SOH CAH TOA but i don't believe im getting the right answers cause it seems to be way out of proportion
  5. Oct 16, 2008 #4


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    Can you figure out what the x- and y-components are?
  6. Jan 19, 2009 #5
    yea man i did that and figured it out
    thank you
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