1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Why does a piece of glass stick to another piece of glass?

  1. Dec 2, 2008 #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. Dec 2, 2008 #2


    User Avatar
    Homework Helper

    Air pressure would have nothing to do with it?
  4. Dec 2, 2008 #3
    ^ 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. Dec 2, 2008 #4
    Sorry to ask but is it air pressure?
  6. Dec 3, 2008 #5
    Why does a sucker-tipped arrow stick to a target?
  7. Dec 3, 2008 #6


    User Avatar
    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook