Posted by pete on Tuesday, June 7, 2011 at 4:08pm.
Try some of these:
http://search.yahoo.com/search?fr=mcafee&p=throw+a+ball+straight+up+at+a+speed+of+27.8+m%2Fs%2C+how+many+seconds+will+it+rise+before+it+starts+to+fall%3F
Sra
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