Odpowiedzi

2009-10-18T18:14:50+02:00
V=20m/s

t=V/a

20/2,5= 8s
s=at²/2

s=2,5*64/2=90m
1 1 1
2009-10-18T18:22:45+02:00
V = 72km/h = 20m/s
a = 2,5m/s2
t = ?

t=V/a
t=20m/s / 2,5/s2
t=8s

s=1/2V×t
s=1/2×20m/s×8s
s=80m
2 5 2