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Extreme situations in physics problems

  1. Dec 5, 2013 #1
    "Extreme situations" in physics problems

    I don't know if this question is pertinent for this discussion forum. I was making some study notes, and i was trying to recollect statements that are always "extreme" in physics problems (such as mechanics). Until now, i have found two of them: Lose contact with the ground (the normal force is 0), and rope goes slack (tension force is 0). I was wondering, are there any other "extreme situations" that i should be aware of?

    Thank you very much for your time.
  2. jcsd
  3. Dec 6, 2013 #2


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    Why are those examples considered extreme?

    What about..

    Black holes?
    Two different ideal voltage sources connected in parallel?
    The tension in a perfectly horizontal string?
  4. Dec 6, 2013 #3
    I think there may be a language issue. Probably what the OP means is "limiting" or "ideal."
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