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 Thread: Homework help View Single Post
 08-04-2007 #5 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 When you drop a book at 12 feet, the initial velocity is 0. So the position function is: $s(t)=-16{t^2}+12=0$ $16{t^2}=12$ $t^2=0.75$ $t=\sqrt[2]0.75$ $t\approx0.87$ Conclusion: Your answer is correct. __________________ Do Math and you can do Anything!