1. primul mobil -notam cu A v=d/t ( / insemna linie de fractie) (1)
t=20 min =0,33 h Din relatia (1) scoatem d=>d=v*t=0,33h*90km/h=29,7 km
v=90km/h
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d=?
2)A-mobilul
d=400m
v=8m/s
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t=?
v=d/t=>t=d/t=400/8=50 m