Force needed to pull something from something liquid

AI Thread Summary
Calculating the force needed to pull an object from a liquid or soft material, such as mud or quicksand, is complex and depends on various factors. There is no straightforward formula applicable to all situations, as the required force can vary based on the material's properties and the speed of extraction. A force diagram may help visualize the forces at play, including suction and pressure considerations. The interaction between the object and the material significantly influences the force needed. Overall, each scenario requires a tailored approach to determine the necessary force.
Lightsyn
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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
 
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Depends on the situation. In general, there is no formula where you could just plug in numbers.
 
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?
 
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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