Why does a piece of glass stick to another piece of glass?

  1. 1. The problem statement, all variables and given/known data
    What does a piece of glass stick to another piece of glass? We conducted a demo in school where we stuck to pieces of identical see-through glass on top of each other and they stuck together for a second or two.


    2. Relevant equations
    None whatsoever other than it was about "Over Polished" Substances


    3. The attempt at a solution
    It sticks due to their friction
     
  2. jcsd
  3. LowlyPion

    LowlyPion 5,328
    Homework Helper

    Air pressure would have nothing to do with it?
     
  4. ^ I'm sorry.... Its just that its been two weeks since that lecture and he told us just to watch it... It was a lab demo of Over Polished substances...
     
  5. Sorry to ask but is it air pressure?
     
  6. Why does a sucker-tipped arrow stick to a target?
     
  7. minger

    minger 1,498
    Science Advisor

    Draw a free-body diagram and indicate where atmospheric pressure exerts forces. How much "atmosphere" exists between two pieces of identical highly-polished pieces of glass?
     
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