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h= 20 m
t= 1s
m= 5000kg
szukane:
p=?
Wzór:
w= Fxh f= mg
w= 50000N x 20 m f= 5000kg x 10 N/kg
w=1000000 J f= 50000N
P= W/ t
P= 1000000J/ 1s
P= 1000000watt
P=1 MW
s = 20m
t = 1s
m = 5000kg
g = 10 m/s²
P = W/t
W = F*s
F = m*g
W = m*g*s
P = m*g*s/t
P = 5000*10*20/1
P = 1000000 W