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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?
    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


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    2017 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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