Posted by Ethan on Sunday, January 16, 2011 at 1:54pm.
hf=hi+vi*t-4.8t^2 you know hi=0, hf, t solve for vi
at the top, vf=0
vf^2=vi^2+2gh where g=-9.8 solve for h.
h = Vi t - 4.9 t^2
.515 = Vi (.203) -4.9 (.041)
.203 Vi = .717
Vi = 3.53 m/s
(b) v = Vi - 9.8 t
(c) 0 = Vi - 9.8 t solve for t at top
then
h = Vi t - 4.9 t^2
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