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Physics · Density of materials

Crossover

A solid glass marble of density ρ=2500 kg/m3\rho = 2500\text{ kg/m}^3 and volume V=1.0×105 m3V = 1.0 \times 10^{-5}\text{ m}^3 (10 cm310\text{ cm}^3) is released in water (g=9.8 N/kgg = 9.8\text{ N/kg}, ρwater=1000 kg/m3\rho_{\text{water}} = 1000\text{ kg/m}^3). What is the NET DOWNWARD FORCE accelerating the marble towards the bottom?

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