How high does the football go above ground?
A football is kicked vertically upward from the ground and a student gazing out of the window sees it moving upward past her at velocity 5.30 . The window is a height 12.5 above the ground. You may ignore air resistance.Take the free fall acceleration to be = 9.80 .How much time does it take to go from the ground to its highest point?
Take the free fall acceleration to be = 9.80 .
find intial velocity
Vf^2 = 2ad + Vi^2
Vf = final velocity
a = acceleration
d = displacement
Vi = initial velocity
(5.3)^2 = 2(-9.8)(12.5) + Vi^2
Vi^2 = 273.09
Vi =~ 16.53 m/s
Vf = at + Vi
when te ball reaches its highest point, its velocity is 0m/s
0 = -9.8t + 16.53
-16.53 = -9.8t
t =~ 1.686s