[tex]P=2*10^3~kW=2*10^6~W\\\\
m=2*10^2~tone=2*10^5kg\\\\
F_f=0,04*2*10^5*10=8*10^4~N\\\\
\\\\
P= \frac{L}{\Delta t}= \frac{F_{tractiune}*d}{\Delta t}=F*V_m\\\\
\bold{P=F_{tractiune}*V_m} \\\\
F_{tractiune}*10=2*10^6\\\\
F_{tractiune}= \frac{2*10^6}{10}\\\\
F_{tractiune}=2*10^5~N\\\\
\\\\
m*a=F_{tractiune}-F_f\\\\
=\ \textgreater \ a= \frac{F_{tractiune}-F_f}{m} \\\\
=\ \textgreater \ a= \frac{2*10^5-8*10^4}{2*10^5} \\\\
=\ \textgreater \ a= \frac{1210^4}{2*10^5}\\\\
=\ \textgreater \ \bold{a=0,6 \frac{m}{s^2} }[/tex]
