Ciało spada swobodnie z wysokości 12 m. Oblicz w jakim czasie dotrze do wysokości 0 m.
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g = 10 m/s²
h = 12 m
t = ?
h = g*t²/2
2h = gt²
t² = 2h/g
t = √2h/g
t = √2 *12 m /10 m/s²
t = √2,4 s²
t ≈ 1,55 s