Posted by sophie on Tuesday, October 20, 2009 at 8:57pm.
How will we KNOW what 2a refers to?
Sra
For goodness sake! Please use standard English. I just figured out what the 2a was = to a (with necessary space between) Please try some of the sites here:
http://www.google.com/search?q=friction+forces+between+2+surfaces+%26+the+law+of+universal+gravitation&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
Sra
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