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s = 20 meter
V(t) = Vo - a.t (negatif karena perlambatan)
0 = 10 - at
at = 10
a = 10/t
s = Vo.t - 1/2 a.t^2
20 = 10.t - 1/2 . 10/t .t^2
20 = 10t - 5 . t
20 = 10t - 5t
20 = 5t
t = 20/5
t = 4 detik
Vt = 0 m/s
S = 20 m
Vt² = Vo² + 2.a.s
0 = 100 - 40a
a = 2,5 m/s²
Vt = Vo + a.t
0 = 10 - 2,5t
t = 4 s