Fluids and Newton's Laws (Buoyancy)

AP Physics 1· difficulty 2/5

A wood block of density 600 kg/m3600~\text{kg/m}^3 floats in water (1000 kg/m31000~\text{kg/m}^3). What fraction of the block is submerged?

  • A

    0.500.50

  • B

    0.800.80

  • C

    0.600.60

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  • D

    0.400.40

Explanation

Floating: Vsub/V=ρwood/ρwater=600/1000=0.60V_\text{sub}/V = \rho_\text{wood}/\rho_\text{water} = 600/1000 = 0.60.

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