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Δt = 3s
Δv = 54km/h = 54×1000m/3600s = 1,5m/s
Szukane:
a = ?
s = ?
Wzory:
a = Δv/Δt
s = at²/2
a = 1,5m/s : 3s
a = 0,5 [m/s×1/s]
a = 0,5m/s²
s = 0,5m/s²×(3s)²/2
s = 0,5m/s²×9s²/2 [sekundy kwadratowe się skrócą]
s = 0,5m×9/2
s = 2,25m
Odp.: Samochód z przyspieszeniem 0,5m/s² po trzech sekundach jazdy przejechał 2,25m.