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December 21, 2014

December 21, 2014

Posted by **Jessica** on Sunday, November 25, 2012 at 8:25pm.

- Math -
**Steve**, Sunday, November 25, 2012 at 8:57pmthe height h at time t is given by

h(t) = 480 - 16t - 16t^2

when it hits the ground, h=0, so solve

30-t-t^2 = 0

(6+t)(5-t) = 0

t = 5 sec.

the velocity v at time t is

v = -16 - 32t

v(5) = -16 - 160 = -176 ft/s

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