1)Se da:
[tex]m=10t=10000kg\\
v=54 \frac{km}{h} =15 \frac{m}{s}\\
Ec=?\\
Formule:\\
Ec= \frac{m* v^{2} }{2}\\
Calcule:\\
Ec= \frac{10000* 15^{2} }{2} =1125000J=1,125MJ.\\
Raspuns:c)\\
2)\\
\sqrt{ \frac{2Ec}{m} } = \sqrt{\frac{2*m*v^{2}}{2*m} }= \sqrt{v^{2}}=v;\\
v[SI]= \frac{m}{s}=m*s^{-1}\\
Raspuns:a)[/tex]
