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Penetrating 9 feet of concrete?

  1. Apr 26, 2006 #1
    How much kinetic energy or momentum would an object need to penetrate 9 feet of heavy grade reinforced concrete?
  2. jcsd
  3. Apr 26, 2006 #2


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    Gold Member

    The question is waaaaaaaaaaaay too vague. Are you talking about things like bunker busters?
  4. Apr 27, 2006 #3


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    Staff Emeritus
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    Neutrinos do it with less than an electronvolt...
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