International ASPhysicsEdexcelTopic Questions1. Mechanics & MaterialsDensity, Upthrust & Viscous Drag

Density, Upthrust & Viscous Drag (Edexcel International AS Physics)

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1
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A student measured the terminal velocity of different objects as they fell through a liquid. The student used the measurements and Stokes’ Law to calculate the viscosity of the liquid.

For which of the following conditions does Stokes’ Law apply?

  • spherical objects and laminar flow

  • spherical objects and low viscosity

  • cylindrical objects and laminar flow

  • cylindrical objects and low viscosity

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2
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A cylinder of aluminium has a weight of 35.0 N and a volume of 1.32 × 10−3 m3 .

Which of the following calculations gives the density of aluminium in kg m−3 ?

  • fraction numerator 9.81 space cross times 1.32 space cross times 10 to the power of negative 3 end exponent over denominator 35.0 end fraction

  • fraction numerator 1.32 space cross times 10 to the power of negative 3 end exponent over denominator 35.0 space cross times space 9.81 space end fraction

  • fraction numerator 35.0 space over denominator 9.81 cross times 1.32 space cross times 10 to the power of negative 3 end exponent end fraction

  • fraction numerator 35.0 space cross times space 9.81 space over denominator 1.32 space cross times 10 to the power of negative 3 end exponent end fraction

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