what factors affect the friction forces between two surfeces 2a what is the law of universal gravitation
science - SraJMcGin, Tuesday, October 20, 2009 at 10:36pm
How will we KNOW what 2a refers to?
science - SraJMcGin, Tuesday, October 20, 2009 at 10:38pm
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: