Question

od 2 do 4 plissssss

Answer 1

2) s=12km=12000m

t=20min=20*60=1200s

v=?m/s

v=s/t=12000/1200=10m/s

3) s=30km

t=1/2h

v=s/t=60 km/h

4) s=2,4 km

t=10min=10/60 h=1/6 h

v=s/t=2,4*6=14,4 km/h

5) v=2 mm/s

t=5min =5*60=300s

s= ?

v=s/t  s=vt

s=vt=2*300=600mm=60 cm =0,6 m

6) v=108 km/h=108000/3600 m/s=30 m/s

t=1s

v=s/t

s=vt=30*1=30m