i. v2 = u2 – 2gs v =0
u^2 = 2gs
u^2 = 2 x 10 x 200
=4000
U = v4000
U = 63.25 m/s
S= ut – 1/2 gt^2
t=2u/g
t=2 x 63.25/10
t =12.10 s
joseph rimiru answered the question on October 6, 2017 at 20:14
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