Jawabanmu

2014-08-27T19:26:53+07:00
Diket : Vawal = 0 (mula mula diam)
Vakhir = 72 km/jam : 3600 m/s = 20 m/s
t = 30 s
Dit : a?
Jwb : a = segitigaV / t
= Vakhir - Vawal : t
= 20 m/s - 0 : 30 s = 2/3 m/s2