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Old 2008-11-18, 20:41   #6
davieddy
 
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"Lucan"
Dec 2006
England

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Quote:
Originally Posted by Joshua2 View Post
20 - 2*9.8*1*mu - 9.8*3*mu = 3*a is how I thought of it, giving 0.62 for the 2nd and 1.77 for the first. So I think the 2nd answer is wrong, right?
Your formula agrees with mine.
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