# physics

A soccer ball is kicked off of the ground at 17 ft/sec @ 30 degrees. Determine the maximum height above the ground the ball reaches and how far downfield the ball lands.

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1. time in the air...

hf=hi+vi*t-1/2 gt^2
0=0+17 sin30 t -4.9t^2 solve for time in air t.

max height? figure max height is at t/2

hf=vi*t/2 - 4/9 (t/2)^2

distance?
d=vhoriz*t where vhoriz=17*cos30

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