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P= 200 W t=?
m= 2 kg
h= 10 m
g=10 N/kg
Rozwiązanie:
Ep=m*g*h
Ep=2 kg* 10 N/kg * 10 m
Ep= 200 J
Ep= W, więc:
W= 200 J
P=W/t
t=W/P
t=200 J/ 200 W
t= 1 s
Odp: Zajęło jej to 1 s.