Sebuah mobil yang mula" diam,kemudian bergerak dipercepat hingga kecepatannya menjadi 72 km/jam.Setelah bergerak selama 30 sekon percepatanya adlh......
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vt = 72 km/jam = 20 m/s
t = 30s
a = ?
vt= vo + at
20 = 0 + 30a
a = 20/30
a = 2/3 = 0,667 m/s²