va roggggg e pt Maine dau 10 p

Va Roggggg E Pt Maine Dau 10 P class=

Răspuns :

4 nu se vede suficient de clar

5.
O,9km=900m
T=d:v
T=900m:3m/s
T=300s

6.
54km/h:3,6=15m/s
T=d:v
T=500m:15m/s
T=33,(3)s
5
v=d/t
v=0,9km
t=d/v
t=900m/3 m/s = 900/3= 300s

6 v=54km/h
d= 150m+500m
5400m.......................3600sec
660 m ........................ x sec
x=660×3600/54000 =44 sec