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A bullet goes through a ballistic pendulum, what is it's initial velocity?

  1. Dec 6, 2009 #1
    1. The problem statement, all variables and given/known data
    A 7.0-g bullet is fired into a 1.5-kg ballistic pendulum. The bullet emerges from the block with a speed of 200 m/s, and the block rises to a maximum height of 12 cm. Find the initial speed of the bullet.


    2. Relevant equations
    Conservation of Momentum


    3. The attempt at a solution
    I first converted all of my units into SI units. I then went to use the Conservation of Momentum for Glancing Collisions, with X and Y components, but I am confused as to what the components of the bullet are. All I know is that the pendulum rises at some angle to .12 m above it's original position and I'm not sure how to interpret this into an equation. Any assistance will be greatly appreciated.
     
  2. jcsd
  3. Dec 6, 2009 #2

    Lok

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    Is it necessary to do this with Cons of momentum as Cons of energy seems easier?
     
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