Odpowiedzi

2009-12-11T16:07:58+01:00
P = W/t

W = F*s

P = F*s/t

F = m*g

P =m*g*s/t

s = v*t

P = m*g*v*t/t = m*g*v

P = 4000 W =4kW
2009-12-11T16:12:08+01:00
F=m x g
F=80kgx 10m/s= 800N
s=v x t
s=5m/s x 0.02s= 0.1 m
W(praca)=F x s
W=800N x 0.1m=80 J
P=W:t
P=80J:0.02s=4000W=4kW


myslę że to tak ma by xD
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