ile wynosi objetosc deski sosnowej , jezeli jej ciezar wynosi 160 N . gestosc drewna sosnowego = 500 kg/ m( do 3) pliss na dzisiaj xdd
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F = mg => m = F/g
m = 160N/10m/s² = 16kg
m = 16kg
d = 500kg/m³
V = m/d
V = 16kg/500kg/m³ = 0,032m³
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