Question

Um trem anda 2000m em 80km/h determine o tempo gasto

Answer 1

Olá,

$2000m=2km\\\\v_m=\dfrac{\Delta s}{\Delta t}\\80km/h=\dfrac{2km}{\Delta t}\\80km/h\cdot\Delta t = 2km\\\Delta t=\dfrac{2km}{80km/h}\\\Delta t =\dfrac{2}{80}h\\\\\Delta t=\dfrac{2}{80}\cdot60\\\Delta t=\dfrac{2\cdot60}{80}\\\Delta t=\dfrac{120}{80}min\\\Delta t=1,5min$

Espero ter ajudado.

Bons estudos! :)