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Inelastic collision: finding initial velocity of projectile

  1. Nov 2, 2008 #1
    1. The problem statement, all variables and given/known data
    One way to measure the muzzle velocity of a bullet is to fire it horizontally inot a massive block of wood hanging from a string an d measure the height to which the wood (containing the bullet) rises.
    in one experiment the bullet had a mass of .05kg, and the wood has a mass of 2kg. After the shot, the wood and bullet rose to a height of .5 meteres. waht was the original speed of the bullet?

    2. Relevant equations

    d=(vf2-vi2)/2a
    KE=1/2Mv2
    change of ENERGYsystem=constant
    PEi +KEi=PEf + KEf
    PE=Mgh
    3. The attempt at a solution
    i ended up with 29.17 m/s for the original speed
     
  2. jcsd
  3. Nov 3, 2008 #2
    Re: Help!!

    Could you show your work please?
     
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