Dane
m = 450t = 450.000kg
s = 2km = 2.000m
V = 72km/h = 20m/s
Szukane
F = ?
Wzory
[tex]F = ma[/tex]
[tex]t = \frac{2s}{v} [/tex]
[tex]a = \frac{v}{t} [/tex]
Zatem
[tex]t = \frac{4000m}{20 \frac{m}{s} } = 200s[/tex]
[tex]a = \frac{20 \frac{m}{s} }{200s} = 0.1 \frac{m}{ {s}^{2} } [/tex]
[tex]F = 450000 \times 0.1 = \boxed{45000N}[/tex]
