[tex]Dane:\\m = 1200 \ kg\\v_{o} = 108\frac{km}{h} = 108\cdot\frac{1000 \ m}{3600 \ s} = 30\frac{m}{s}\\v=0\\F_{h} = 2 \ 400 \ N\\Szukane:\\s = ?\\\\Rozwiazanie\\\\s = v_{o}t - \frac{1}{2}at^{2}\\\\ale:[/tex]
[tex]a = \frac{F_{h}}{m} = \frac{2400 \ N}{1200 \ kg} = 2\frac{m}{s^{2}}\\\\a = \frac{\Delta v}{t}=\frac{v_{o}}{t} \ \ \rightarrow \ \ t = \frac{v_{o}}{a} = \frac{30\frac{m}{s}}{2\frac{m}{s^{2}}} = 15 \ s[/tex]
[tex]s = v_{o}t - \frac{1}{2}at^{2}}\\\\s = 30\frac{m}{s}\cdot15 \ s - \frac{1}{2}\cdot2\frac{m}{s^{2}}\cdot(15 \ s)^{2}}\\\\s = 450 \ m - 225 \ m\\\\\boxed{s = 225 \ m}[/tex]
