Force needed to pull something from something liquid

Click For Summary

Discussion Overview

The discussion revolves around calculating the force required to pull objects that are stuck in various liquids or semi-liquids, such as mud, quicksand, or water. Participants explore different scenarios and factors influencing the force needed in these situations.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the calculation of force needed to pull objects stuck in substances like mud or quicksand.
  • Another participant suggests that there is no straightforward formula applicable to all situations.
  • A participant proposes the idea of using a force diagram and questions whether the suction force of mud can be calculated, mentioning the role of pressure.
  • It is noted that the force required may vary depending on the speed at which the object is pulled from the material.

Areas of Agreement / Disagreement

Participants do not reach a consensus, as multiple competing views and uncertainties about the calculation methods and influencing factors remain evident.

Contextual Notes

Limitations include the lack of a general formula, dependence on specific conditions such as the type of material and the speed of extraction, and unresolved questions about the role of pressure and suction forces.

Lightsyn
Messages
3
Reaction score
0
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:
Physics news on Phys.org
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.
 

Similar threads

  • · Replies 8 ·
Replies
8
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 13 ·
Replies
13
Views
10K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K