[latex]Dane:\ v_0=0\ v=120frac{km}{h}=frac{100}{3}frac{m}{s}\ s=1km=1000m\ Szukane:\ a=?\ Rozwiazanie:\ s=v_ot+frac{1}{2}at^2\ Gdzie: a=frac{Delta v}{t}=frac{v}{t}\ \ s=0*t+frac{1}{2}frac{v}{t}t^2\ \ s=frac{1}{2}vt\ \ t=frac{2s}{v}=frac{2*1000}{frac{100}{3}}=60s\ \ Wiec a wynosi:\ \ a=frac{v}{t}=frac{frac{100}{3}}{60}=frac{100}{180}approx0,56frac{m}{s^2}[/latex]
[latex]dane:\v_{o} = 0frac{km}{h}\v = 12frac{km}{h} = 120cdotfrac{1000m}{3600s} = 33,(3)frac{m}{s} = 33,33frac{m}{s}\s = 1 km = 1000 m\szukane:\a = ?\\Rozwiazanie:\a = frac{v}{t}\\Liczymy czas t:\s = frac{at^{2}}{2}\\a = frac{v}{t}\\s = frac{1}{2}cdotfrac{v}{t}cdot t^{2}}\\s = frac{1}{2}vcdot t |cdotfrac{2}{v}\\t = frac{2s}{v} = frac{2cdot1000m}{333,3frac{m}{s}} = 60 s[/latex] [latex]Przyspieszenie a:\a = frac{v}{t}\\a = frac{33,33frac{m}{s}}{60s} = 0,(5)frac{m}{s^{2}}=0,6frac{m}{s^{2}}[/latex]
