1.
[tex]v_{p} = 4\frac{m}{s}\\t = 33 \ s\\v_{k} = 13\frac{m}{s}\\\\a=\frac{\Delta v}{t} = \frac{v_{k}-v_{p}}{t}\\\\a = \frac{13\frac{m}{s}-4\frac{m}{s}}{33 \ s} = \frac{9\frac{m}{s}}{33 \ s}\\\\\boxed{a = 0,27\frac{m}{s^{2}}}[/tex]
2.
[tex]v_{p} = 0\\t = 5 \ s\\v_{k} = 10\frac{m}{s}\\\\a = \frac{\Delta v}{t} = \frac{v_{k}-v_{p}}{t} = \frac{v_{k}}{t}\\\\a = \frac{10\frac{m}{2}}{5 \ s}\\\\\boxed{a = 2\frac{m}{s^{2}}}[/tex]
