Force on surface with quantification

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SUMMARY

The discussion centers on calculating the force exerted on a black surface by a volume of undeformable red balls under pressure. The participants explore the implications of forces acting on the surface, particularly in relation to frictionless conditions and the behavior of gas atoms. Key insights include the consideration of how the number of contact points affects force distribution and the distinction between static and dynamic forces. The conversation concludes that while a force may exist, the net force on the black volume remains zero if it does not move.

PREREQUISITES
  • Understanding of basic physics concepts, particularly forces and pressure.
  • Familiarity with frictionless surfaces and their implications in mechanics.
  • Knowledge of atomic behavior in gases and statistical mechanics.
  • Ability to visualize and analyze force diagrams in static and dynamic scenarios.
NEXT STEPS
  • Research the principles of static and dynamic equilibrium in physics.
  • Learn about pressure distribution in fluids and gases, focusing on concepts like Pascal's Law.
  • Explore force calculation methods in mechanics, including vector analysis.
  • Investigate the behavior of particles in a gas under varying temperature conditions.
USEFUL FOR

This discussion is beneficial for physics students, mechanical engineers, and anyone interested in understanding force interactions in static and dynamic systems, particularly in relation to pressure and atomic behavior.

Gh778
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I would like to calculate the force on the black surface (cut view) where the black volume (undeformable) is put on pressure with a lot of red ball undeformable. The pressure is give for example with a weight. Like in the slope we can put 5 balls and only 1.5 balls in vertical side I think the pressure give a force to the right. Is there a method for calculate the force ?
 

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Hi Gh778! :smile:

I assume the balls are all stationary?

Hint: if the block was on a frictionless surface, would it move? :wink:
 
I would like to know if there is a force.

would it move?
Like that, even frictionless, no
 
Gh778 said:
… even frictionless, no

so which direction are the forces on it? :wink:
 
Change red balls for atoms (atoms of gas for example). Even a surface like I draw it's not possible to build. The temperature move atoms everywhere and like that the black volume can move (it's not block by mechanic balls). The vertical line can only put 1.5 contact (even it's statistical), this compensate the other force ? The quantification don't interact here ?
 
Last edited:
sorry, I'm not following you :confused:

anyway, if the block doesn't move, what is the net force on it?
 
with mechanicals balls the black volume is blocking, it can't move even a force exist. With gas and temperature, the volume can move (can, I don't say it move). Is a force exist when the slope can accept 5 atoms and other side 1.5 atoms ? I would like to calculate this force but maybe someone has already do that ?
 

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