Odpowiedzi

2010-02-13T15:35:56+01:00
M = 2 kg
V = 20 m/s
t = 5 s
F = ?
F = m*a ; a= V/t

F = m *V/t

F = 2 kg * 20 m/s/5s

F = 8 N

[N] = [kg *m/s^2]