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Force needed to pull something from something liquid

  1. Sep 13, 2015 #1
    Hi... any idea on how to calculate force needed to pull up something stuck on the ground?
    ex:
    Boot stuck on mud
    person sinking on quicksand
    or car sinking in water
     
    Last edited: Sep 13, 2015
  2. jcsd
  3. Sep 13, 2015 #2

    mfb

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    2016 Award

    Staff: Mentor

    Depends on the situation. In general, there is no formula where you could just plug in numbers.
     
  4. Sep 13, 2015 #3
    What about a force diagram?
    perhaps a way to calculate the force of the suction of mud?
    does pressure has something to do with it?
     
  5. Sep 13, 2015 #4
    Nothing simple and general. For materials like mud or quicksand the force may even depend on how fast you try to pull something out of it.
     
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