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dik :
V = 72 km/jam
t = 15 s
dit : s ?
Vt = (72x1000)/3.600
= 20 m/s
s = v x t
= 20 x 15
= 300 m
nomor 9 :
dik :
Vo = 0
t = 15
a = 2
dit : V t ?
dijwb :
a = (Vt-Vo)/t
2 = (Vt-0)/15
2x15 = Vt-0
30 = Vt
nomor 10
dik :
V0 = 36 km/jam
Vt=0
a = -2
dit : t ?
dijwb :
Vo = (36x1000)/3.600
= 10 m/s
a = (Vt-Vo)/t
-2 = (0-10)/t
-2t = -10
t = -10/-2
t = 5 s