2.
[tex]Dane:\\v_{o} = 0\\a = 3\frac{m}{s^{2}}\\v = 60\frac{km}{h} = 60:3,6\fracc{m}{s} = 16,(6)\frac{m}{s}\approx16,67\frac{m}{s}\\Szukane:\\t = ?\\\\Rozwiazanie\\\\a = \frac{v}{t} \ \ \rightarrow \ \ t = \frac{v}{a}\\\\t = \frac{16,67\frac{m}{s}}{3\frac{m}{s^{2}}}\\\\\boxed{t \approx5,6 \ s}[/tex]
2.
[tex]Dane:\\v_{o} = 0\\t = 0,5 \ min = 30 \ s\\a = 1\frac{m}{s^{2}}\\Szukane:\\v = ?\\\\Rozwiazanie\\\\v = a\cdot t\\\\v = 1\frac{m}{s^{2}}\cdot30 \ s\\\\\boxed{v = 30\frac{m}{s}}[/tex]
