Wednesday

August 27, 2014

August 27, 2014

Posted by **mb** on Thursday, September 25, 2008 at 11:13pm.

- physics -
**Damon**, Friday, September 26, 2008 at 4:25amv = Vo -9.8 t

z = h + Vo t - 4.9 t^2

here Vo = initial speed up = 0

h = 50

z = final height = 0

so

0 = 50 - 4.9 t^2

so t = 3.19 seconds to fall

v = 0 - 9.8 * 3.19 = -31.3 m/s

so the speed down is 31.3 and the horizontal speed is still 18

tangent of angle from vertical = 18/31.3

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