Question

Exprimati in m/s urmatoarele viteze:
a)36 km/h 9 km/h 18 km/h 72 km/h 54 k/h si 90 km/h
b)1,2 km/min 0,6 km/min 0,9 km/min si 0,15 km/h

Answer 1

$\bold{a)} \ 36 \ km/h=36 \ 000 \ m/3 \ 600 \ s=10 \ m/s; \\ 9 \ m/h=9 \ 000 \ m/3 \ 600 \ s=2,5 \ m/s; \\ 18 \ km/h=18 \ 000 \ m/3 \ 600 \ s=5 \ m/s; \\ 72 \ km/h=72 \ 000 \ m/3 \ 600 \ s=20 \ m/s; \\ 54 \ km/h=54 \ 000 \ m/3 \ 600 \ s=15 \ m/s; \\ 90 \ km/h=90 \ 000 \ m/3 \ 600 \ s=25 \ m/s.$
$\bold{b)} \ 1,2 \ km/min=1 \ 200 \ m/60 \ s=20 \ m/s; \\ 0,6 \ km/min=600 \ m/60 \ s=10 \ m/s; \\ 0,9 \ km/min=900 \ m/60 \ s =15 \ m/s; \\ 0,15 \ km/h=150 \ m/3 \ 600 \ s=0.0416 m/s.$