Dane
h = 4m
g = 10m/s²
Szukane
t = ?
Wzór
[tex]h = \frac{g {t}^{2} }{2} | \times 2 \\ 2h = {gt}^{2} | \div g \\ {t}^{2} = \frac{2h}{g} \\ t = \sqrt{ \frac{2h}{g} } [/tex]
Obliczenia
[tex]t = \sqrt{ \frac{2 \times 4m}{10 \frac{m}{ {s}^{2} } } } = \sqrt{ \frac{8m}{10 \frac{m}{ {s}^{2} } } } = \sqrt{0.8 {s}^{2} } \approx0.89s \approx 0.9s[/tex]
[tex] \boxed{Czas \space wynosi: \bold{0.9s}}[/tex]
