Max Mass Supported by 5.6-Diameter Suction Cup

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SUMMARY

The maximum mass supported by a 5.6-inch diameter suction cup mounted on a vertical wall, with a coefficient of friction of 0.65, is determined by calculating the maximum force exerted by atmospheric pressure. The calculation yields a maximum force (Fmax) of 250N, derived from the equation Fmax = pA, where p is atmospheric pressure (101.3 kPa) and A is the area of the suction cup. To find the mass, one must consider the gravitational force acting on the mass, which can be calculated using the formula m = F/g, where g is the acceleration due to gravity (9.81 m/s²).

PREREQUISITES
  • Understanding of basic physics concepts such as force, pressure, and mass.
  • Familiarity with the equations of motion and gravitational force.
  • Knowledge of atmospheric pressure and its effects on suction.
  • Ability to calculate area of a circle (A = πr²).
NEXT STEPS
  • Research the effects of atmospheric pressure on suction mechanisms.
  • Learn about the relationship between force, mass, and acceleration in physics.
  • Explore practical applications of suction cups in various industries.
  • Investigate the impact of different materials and surface textures on suction cup performance.
USEFUL FOR

Students studying physics, engineers designing suction-based systems, and anyone interested in the mechanics of adhesion and pressure applications.

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Homework Statement


How massive an object can be supported by a 5.6 -diameter suction cup mounted on a vertical wall, if the coefficient of friction between cup and wall is 0.65? Assume normal atmospheric pressure.

Homework Equations


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The Attempt at a Solution


I calculated the maximum force which I realized was when the pressure inside the suction =0
Therefore Fmax=pA=101.3*10^3(pi(0.028^2))= 250N.

I don't know how to find the how much mass can be supported by the suction cup. I tried a number of answers and they were all wrong.
 
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If you hook up some mass m to the cup, what forces will be acting on the cup?
 


Turn the experiment 90 degrees in your mind so that the suction cup is resting horizontally atop the wall instead of vertically against it.
 

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