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W=5000J
m=250kg
g=10m/s²
Szukae:
h=?
Rozwiazanie:
F=mg
W=Fh
W=mgh
h=W/mg
h=5000/2500
h=2m
m = 100 × 2,5 kg = 250kg
W = 5000J
Rozw.:
W = Ep = m×g×h
z tego
h = W/ m×g = 5000J / 250kg × 10 [m/s²] = 2 m