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Homework Help: Bullets, wood, and heat

  1. Nov 13, 2006 #1
    How is the bullet-wood problem different in setup if:
    a)the bullet stops in the wood
    b)if the bullet goes through the wood?

    Is it that (a) would be an inelastic and (b) would use conservation of momentum?

    Other question is how can energy loss by heat be calculated by this type of problem?
  2. jcsd
  3. Nov 13, 2006 #2


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    Both are inelastic and both conserve momentum. Heat would be calculated by finding the mechanical energy lost in the process.
  4. Nov 13, 2006 #3
    Yes, in both cases kinetic energy is not conserved. When calculating the heat energy which is equivalent to loss in KE, we have to assume that no energy is converted to producing sound.
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