What is this object called? It deals with Pressure.

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SUMMARY

The object discussed is a suction cup, which operates on the principle of creating a vacuum between the cup and a surface, such as a wooden desk. When the knob on top of the suction cup is turned, it removes air, resulting in low pressure beneath the cup. This creates a significant downward force due to atmospheric pressure acting on the cup's surface area, making it difficult to remove without sliding. The force diagram confirms that the upward force is negligible due to the vacuum created.

PREREQUISITES
  • Understanding of basic physics concepts, particularly pressure and vacuum.
  • Familiarity with force diagrams and calculations involving pressure (F = P * A).
  • Knowledge of how suction cups function in practical applications.
  • Basic experience with AP Physics principles.
NEXT STEPS
  • Research the physics of vacuum creation and its applications in suction devices.
  • Explore the material properties of rubber and its effectiveness in creating airtight seals.
  • Learn about the various applications of suction cups in everyday products and industrial uses.
  • Investigate the mathematical modeling of pressure and force in different scenarios.
USEFUL FOR

Students studying physics, educators teaching pressure concepts, and anyone interested in the mechanics of suction devices.

Lil_Aziz1
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Hi. When I took AP Physics last year, my teacher demonstrated the power of pressure by this object. It looked like a lid. It was rubber. You put the lid on a wooden desk, turn the nod on top of the lid, and try pulling the lid off the desk without sliding the lid. I forgot the name of this object. Does anyone know what it's called?

I was thinking about it one night and I think I have the right concept. Correct me if I'm wrong.

When you turn the nod, everything between the wooden desk and top of the lid becomes a vacuum; thus, it has no pressure. When you draw a force diagram on the lid, there is a force acting down: F= P * A (neglecting the weight of the lid). There is no force acting up because there is barely any pressure. Therefore, it is extremely difficult to pull the lid off the table.

Is that correct?

Thanks in advance!
 
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