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Nie wiem czy to dobrze ....
Dane:
s = 400cm = 4m
t = 0,3min = 18s
Szukane:
a = ?
Wzór
s = at²/2
a = 2s/t² [m/s²]
Rozwiązanie:
a = 8 / 18 x 18
a ≈ 0,025 m/s²