Odpowiedzi

Najlepsza Odpowiedź!
2010-02-27T15:22:04+01:00
V= 72 km/h = 72000 m/3600 s= 20 m/s
P = 1,2 kW = 1200 W = 1200 J/s
F = ?
P = W/t
W = F*s
P= F*s/t ; a.e s/t = V
P = F*v
F = P/V

F = 1200 J/s /20 m/s
F = 60 N
[J/s*s/m] = [J/m] = [N*m/m] = [N]
5 3 5