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Homework Help: Find (a) the speed at which the bullet emerges from the block

  1. Jan 30, 2006 #1
    a .005 kg bullet with and initial speed of 400 m/s is fired through a 1 kg block. The block is at rest on a frictionless, horizontal surface, is connected to a spring of force constant 900N/m. If the block moves .05m to the right after impact. Find (a) the speed at which the bullet emerges from the block and (b) the energy lost in the collis ion.
     
  2. jcsd
  3. Jan 31, 2006 #2
    Use conservation of momentum and then use the speeds you find to calculate the change in KE.
     
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