Posted by j on Tuesday, February 14, 2012 at 4:48pm.
figure vertical velocity intial: 42sin45
then, knowing the vertical velocity at the peak is zero...
Vf^2=Vi^2+2gd
figure d
so does that mean vf is zero, vi is 29.69848481, and g is 9.8
g is -9.8m/s^2, so the answer d will be postive, or it should be. Your carrying all those digits on V is nonsense. You are restricted to two significant digits, given the info in the problem.
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