Odpowiedź :
[tex]F = 2 \ kN = 2 \ 000 \ N\\W = 40 \ kJ = 40 \ 000 \ J = 40 \ 000 \ N\cdot m\\h = ?\\\\W = F\cdot h \ \ /:F\\\\h = \frac{W}{F}\\\\h = \frac{400000 \ N\cdot m}{2000 \ N}\\\\h = 20 \ m[/tex]
[tex]F = 2 \ kN = 2 \ 000 \ N\\W = 40 \ kJ = 40 \ 000 \ J = 40 \ 000 \ N\cdot m\\h = ?\\\\W = F\cdot h \ \ /:F\\\\h = \frac{W}{F}\\\\h = \frac{400000 \ N\cdot m}{2000 \ N}\\\\h = 20 \ m[/tex]