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FRICTION -TWO SURFACES THAT RUB AGAINST EACH OTHER<br />
(2 of 2)<br />
Magnified Razor Blade Edges Are Not In Contact<br />
Friction forces are due to the interlocking of surface irregularities, the attraction between the contact points due to forces between the molecules of the 2 objects & the plowing out of softer materials by harder ones.

Fphoto-30359111A-3PS.jpg

FRICTION -TWO SURFACES THAT RUB AGAINST EACH OTHER
(2 of 2)
Magnified Razor Blade Edges Are Not In Contact
Friction forces are due to the interlocking of surface irregularities, the attraction between the contact points due to forces between the molecules of the 2 objects & the plowing out of softer materials by harder ones.

Copyright:© 1991 Paul Silverman - Fundamental Photographs

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Paul Silverman