Question

un autoturism isi mărește viteza v1=54 km/h la v2 = 72 km/h in intervalul de timp delta t =10 s . Ce acceleratie are automobilul daca se mișca rectiliniu ?

Answer 1

$\Delta t=10~s \\ \\ \Delta v=v_2-v_1=72-54=18~km/h=\frac{18000m}{3600s}=5~m/s \\ \\ a=\frac{\Delta v}{\Delta t}=\frac{5m/s}{10s}=0,5~m/s^2$