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The distance travelled in the Y-axis by an arrow

  1. Mar 29, 2010 #1
    hi

    I am normally good at physics, but i am abit stuck, because i feel im missing relevant information.

    A 100g arrow is shot vertically from a bow whose effective spring constant is 500 n/m,If the bow is drawn 65cm before shooting the arrow, to what height does the arrow rise?

    i worked out the force being put on the arrow is 325 N, but how do i work out the initial velocity?i know that when i have that i can just do the equation

    Y=VoSin0ot-0.5gt^2
    etc to find the distance in the Y-axis, but how do i get to this step!

    Help me!

    /alex
     
  2. jcsd
  3. Mar 30, 2010 #2
    Why not use energy considerations?
    There is potential energy stored in the bow; what happens to it?
     
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