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-   -   Contact angle of liquid drop on solid surface.2 (http://www.physicsforums.com/showthread.php?t=671975)

amk_dbz Feb15-13 09:56 AM

Contact angle of liquid drop on solid surface.2
 
1 Attachment(s)
Can anyone explain point 44 of the attached pdf document on surface tension.

(Here's the link in case attachment doesn't work:
http://www.sakshieducation.com/EAMCE...0_198-208_.pdf

How is the surface tension direction found out?
{i know it tangential but in which direction along the tangent?}
Also why is surface tension for Solid-Air Surface considered when balancing forces on liquid?
Any help will be appreciated
Thank you.


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