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W=1980J
h=1,98m
g=10m/s^2
SZUKANE:
m=?
Fg=Q=?
W=m*g*h
m=W/(g*h)
m=1980/(10*1,98)
m=100 [kg]
Fg=m*g
Fg=100*10
Fg=1000 [N]
Odp. Sportowiec podniósł sztangę o ciężarze 1000 N.