Question

Ce putere are o locomotiva care,pentru a remorca un tren cu viteza constanta de 54km/h,dezvolta o forta de tractiune de 3x10( la puterea a 4 ) N ? EXprima rezultatul in MW si CP. Astept easpunsurile, va multumesc !

Answer 1

$\diplaystyle\mathtt{P=\frac{L}{t}=F\cdot\frac{d}{t}=Fv} \\ \\ \mathtt{54\frac{km}{h}=15\frac{m}{s}} \\ \\ \mathtt{P=3\cdot 10^4N\cdot 15\frac{m}{s}} \\ \\ \mathtt{P=4,5\cdot 10^5W} \\ \\ \mathtt{P=\frac{4,5*10^5W}{10^6}=4,5*10^{-1}MW=0,45MW} \\ \\ \mathtt{P=\frac{4,5*10^5W}{736}\approx 6\cdot 10^{-3}\cdot 10^5=6\cdot 10^2=600CP}$