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Old 2008-11-18, 18:31   #5
Joshua2
 
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Sep 2004

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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?
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