anonymous
  • anonymous
What is the principle of a sucker?
OCW Scholar - Physics I: Classical Mechanics
chestercat
  • chestercat
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anonymous
  • anonymous
Why can suckers be hold on walls tightly without falling down to the ground?
anonymous
  • anonymous
When you press on it, you force all the air out. This means that there in now a pressure of 1 atmosphere pressing from the outside.
anonymous
  • anonymous
wow this is quite curious question! How can they suck the blood from animals?

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anonymous
  • anonymous
We say "suction cup"... Stan is right; the other part of the answer is that max static friction is equal to mu N, and N is the atmospheric force on the outside of the suction cup.

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