Question

Va rog, ajutati-ma cu aceasta problema!!!:)
Ce putere are o locomotiva care , pentru a remorca un tren cu viteza constanta de 54km/h, dezvolta o forta de tractiune de 3x10⁴ N? Exprima rezultatul in MW si CP

Answer 1

[tex]P= \frac{L}{ \Delta t}= \frac{F\cdot \Delta d}{\Delta t}=F\cdot \frac{\Delta d}{\Delta t}\text{(asta~este~chiar~viteza)}=\\ =3\cdot 10^{4}N\cdot 54 \frac{Km}{h}=3\cdot 10^{4}N\cdot 54 \frac{1000m}{3600s}=\\ =162\cdot 10^{4}N\cdot \frac{10\not0\not0m}{36\not0\not0s}= \frac{4,5\cdot 10^{5}N\cdot m}{s}=\\ = \frac{4,5\cdot 10^{5}J}{s}=450000~W={\boxed{450~MW.}\\ 450000~W\approx\underline{603,4~CP.}[/tex]