A LevelPhysicsEdexcelExam Questions4. MaterialsDensity, Upthrust & Viscous Drag

Density, Upthrust & Viscous Drag (Edexcel A Level Physics): Exam Questions

Exam code: 9PH0

43 mins7 questions

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Density, Upthrust & Viscous Drag

1
1 mark

An object of volume V made from a material of density ρ1 is placed into a fluid of density ρ2.

Which of the following gives the upthrust on the object? 

  • ρ1Vg

  • ρ2Vg

  • (ρ2−ρ1 )Vg

  • (ρ2+ρ1 )2Vg

Choose your answer

2
1 mark

Two small spheres fall at terminal velocity through a viscous liquid. Both spheres are made of the same material.

The first sphere has radius r and falls with terminal velocity v.

The second sphere has radius 2r.

What is the terminal velocity of the second sphere?

  • v2

  • 2v

  • 4v

  • 8v

Choose your answer