Răspuns :
Cunosti
v=108km/h=30m/s
P=48KW=48 000W
Scrii formula puterii
P=L/t unde L=F*d deci P=F*d/t
Dar d/t=v deci
P=F*v de unde scoti
F=P/v
Succes!
v=108km/h=30m/s
P=48KW=48 000W
Scrii formula puterii
P=L/t unde L=F*d deci P=F*d/t
Dar d/t=v deci
P=F*v de unde scoti
F=P/v
Succes!
[tex]v=108 \ km/h=30 \ m/s \\ P=48 \ kW=48 \ 000 \ W \\ \boxed{P=\frac{L}{t}}=\frac{F_t \cdot d}{t}=F_t \cdot v\\
\Rightarrow F_t=\frac{P}{v}=\frac{48 \ 000 \ W}{30 \ m/s}\\ \bold{F_t=1 \ 600 \ J}[/tex]