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t = 4s
a = 5 m/s²
vo = ?
vt = vo + at
40 = vo + 5x4
40 = vo + 20
vo = 40 - 20
vo = 20 m/s
Vt = 40 m/s
t = 4 s
a = 5 m/s
dit : Vo ?
dijwab :
a = (Vt-Vo)/t
5 = (40-Vo)/4
4x5 = 40-Vo
20 = 40 - Vo
Vo = 40-20
Vo = 20 m/s