Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

A.2.9 Stoke’s Law – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Stokes’ law gives the drag force on a small sphere as
6πηrv²
6πηrv
4πηr²v
½ρv²A
2.
If the radius of a sphere falling at terminal speed in a viscous liquid is doubled (same material), the terminal speed becomes
2 times
8 times
4 times
The same
3.
The SI unit of viscosity is
N m⁻¹
N s²
Pa s
kg m⁻³
4.
Stokes’ law is valid for
Small spheres in laminar flow
Turbulent flow
High speed objects
Cars in air
5.
A bubble in water rises because
Its weight is larger than the upthrust
Stokes’ force pulls it
Viscosity is zero
The upthrust exceeds the weight
6.
A sphere reaches terminal speed with weight 0.060 N and upthrust 0.020 N. The drag is
0.020 N
0.040 N
0.060 N
0.080 N
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Part of Theme A — Space, Time and Motion — see every lesson and quiz in this unit.
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