[latex]Dane :\m = 100 [g] = 0,1[kg]\v = 400[ frac{m}{s}]\s = 10[cm] = 0,1[m]\\Szukane :\W = ? \\Rozwiazanie :\W = E_k o Fs = frac{1}{2}mv^2 / : s \F = frac{ frac{1}{2}mv^2 }{s} \\F = frac{ frac{1}{2}cdot 0,1 [kg] cdot 400[ frac{m}{s}] ^2 }{0,1[m]} \\F = 80000 [N] \\W = Fs \\W = 80000 [N] cdot 0,1[m]\W = 8000 [J] = 8[kJ] [/latex]
[latex]Dane: \ \ m=100g=0,1kg \ \ v=400 frac{m}{s} \ \ x=10cm=0,1m \ \ W=? \ \ Ek=W \ \ frac{mv^{2}}{2}=F*x \ \ F= frac{mv^{2}}{2x} \ \ F= frac{0,1kg*(400 frac{m}{s})^{2} }{2*0,1m}= frac{0,1*16000}{0,2} [ frac{kg* frac{m^{2}}{s^{2}} }{m}] =80000[ frac{N*m}{m}]=80000N \ \ W=80000N*0,1m=oxed{8000J }[/latex]
