Question

Trenul unui metrou dezvolta o acceleratie a=1.5 m/s^2.In cat timp acest trenul atinge viteza de regim v=80km/h.

Answer 1

$a=\frac{v}{t} =>t= \frac{v}{a}$=$\frac{200}{9} * \frac{10}{15} = \frac{200}{9} * \frac{2}{3} = \frac{400}{27} =14.814 s$
$\frac{80*1000}{3600}= \frac{800}{36}= \frac{200}{9} m/s$