Odpowiedzi

2010-03-24T16:13:25+01:00
P = 150 kW = 150 000 W = 150 000 J/s
V = 15 m/s
F = ?

P = W/t
W = F*s
P = F*s/t ; ale s/t = V (ruch jednostajny)
P = F*V
F = P/V

F = 150000 J/s / 15 m/s
F = 10000 N = 10 kN

[J/m] = [N*m/m] = [N]
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