Odpowiedzi

2009-12-05T14:33:44+01:00
Dane:
L-pociągu= 120m
V=18km/h
s= 480m
t=?

18km/h=18*1000/3600=5m/s

480+120=500m

V=s/t |*t
V*t=s |/V
t=s/V

t=500/5
t=100s
t=1,40min