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m = 800 kg
vo = 36 km/jam = 10 m/s
s = 150 m
vt = 72 km/jam = 20 m/s
ditanyakan :
t = ?
jawab :
vt = vo + a t
20 = 10 + at
at = 10
s = vo t + 1/2 at t
150 = 10 t + 1/2 (10) t
150 = 10 t + 5 t
150 = 15 t
t = 10 s