Odpowiedzi

2009-05-02T16:36:05+02:00
V = 30 km/h
P = 400 W

F = ?

P = W/t
W = F * s
v = s/t
t = s/v

P = (F * s) / (s/v) = F * v

P = F * v
F = P/v
F = 400 W / 30 km/h = 400 W / 8,(3) m/s ≈ 48 N