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Homework Help: Harmonic Problem

  1. Nov 18, 2007 #1
    Hi! I've been working on this problem for a while, subtracting this and that.. but i can't get the answer which is 557m/s. Help would be greatly appreciated! Thanks in advance ><

    1. A 25.0g bullet strikes a .600kg block attached to a fixed horizontal spring whose spring constant is 6.70x10^3 and sets it into vibration with an amplitude of 21.5cm. What is the speed of the bullet before impact if the two objects move together after impact?


    2. V=A[tex]\sqrt{k/m}[/tex]



    3. I used the equation above, adding the masses together (.625kg). I got the velocity to be 22.26m/s... but now i can't figure out how to get the speed of the bullet.
     
  2. jcsd
  3. Nov 18, 2007 #2
    conservation of momentum
     
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