1.
[tex]Dane:\\t = 80 \ min = \frac{80}{60} \ h = \frac{4}{3} \ h\\v = 60\frac{km}{h}\\Szukane:\\s = ?\\\\\\s = v\cdot t\\\\s = 60\frac{km}{h}\cdot\frac{4}{3} \ h\\\\\boxed{s = 80 \ km}[/tex]
2.
[tex]Dane:\\v_{o} = 0\\t = 3 \ s\\g = 10\frac{m}{s^{2}}\\Szukane:\\v = ?\\\\\\v = g\cdot t\\\\v = 10\frac{m}{s^{2}}\cdot3 \ s\\\\\boxed{v = 30\frac{m}{s}}[/tex]
3.
[tex]Dane:\\v_1 = 70\frac{km}{h}\\t = 5 \ s\\v_2 = 106\frac{km}{h}\\Szukane:\\a = ?\\\\\\a = \frac{\Delta v}{t}\\\\\Delta v = v_2-v_1 = 106\frac{km}{h}-70\frac{km}{h} = 36\frac{km}{h} = 36:3,6\frac{m}{s} = 10\frac{m}{s}\\\\a = \frac{10\frac{m}{s}}{5 \ s}\\\\\boxed{a = 2\frac{m}{s^{2}}}[/tex]
4.
[tex]Dane:\\v_{o} = 0\\t = 0,7 \ s\\g = 10\frac{m}{s^{2}}\\Szukane:\\h = ?\\\\\\h = \frac{1}{2}gt^{2}\\\\h = \frac{1}{2}\cdot10\frac{m}{s^{2}}\cdot(0,7 \ s)^{2}\\\\\boxed{h = 2,45 \ m}[/tex]
