Jawabanmu

2014-09-01T20:29:48+07:00
Vo=72 km/jam=72.000m/3600detik=20 m/s
Vt= 0km/jam= 0 m/s
Δt= 5 s
α=Δv = 20 - 0 = 4m/s
    Δt
      5