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Vo = 30 m/s
Vf = 10 m/s
t = 5 s
a = ?
d = ? si t = 3 s
Formula
a = Vf - Vo / t
a = 10 m/s - 30 m/s / 5 s = - 4 m/s²
d = Vo t + a t² / 2 = (30 m/s)(3 s) + ( - 4m/s²)(3 s)² / 2 =
d = 90 m - 18 m = 72 m