Jawabanmu

2014-08-31T19:48:50+07:00
Dik : Vo = 0 m/s
Vt = 72 km/jam
t = 30 s
dit : a..?
jwb : a = Vt-Vo / t
= 72-0 /30
= 72/30
= 2,4 M/S2 ( meter per sekon kuadrat )