Odpowiedzi

2010-04-13T09:03:30+02:00
Szybkość po 20s
20*20=400m/s

droga
s=at^2/2
s=20*20*20/2
s=4000m=4km
Najlepsza Odpowiedź!
2010-04-13T09:05:38+02:00
A = 20 [m/s]
t = 20 [s]
V = ?
s = ?



V = at
[m/s] = [m/s² × s = m/s]
V = 20 × 20
V = 400 [m/s]

s = 1/2 at²
[m] = [m/s² × s² = m]
s = 1/2 20 × 20²
s = 4000 [m]