[tex]Dane:\\m =80kg\\v = 25\frac{km}{h} \\\\Szukane:\\E_k\\\\Wzor:\\E_k = \frac{mv^2}{2} \\\\Obliczenia:\\\\Zamieniamy~jednostki:\\25 \frac{km}{h} =25* \frac{1000m}{3600s} \approx 6,94 \frac{m}{s} \\\\Podstawiamy~dane:\\E_k = \frac{mv^2}{2} = \frac{80kg*(6,94\frac{m}{s})^2}{2} \approx 1826,54 J\\\\Odp. ~E_k = 1826,54 J[/tex]
