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![[Post New]](/templates/default/images/icon_minipost_new.gif) 24 Apr 2008 21:57:14 IST
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A and D. Contact force is a resultant of frictional force and normal force
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"A perfect mind is a treasure unsurpassed."
"It is said that human beings have 5 senses. That's because most of them lack the 6th - common sense."
-- astatine19 --
http://astatine19.blogspot.com/
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