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.2.7 Frictional Forces – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
A block of weight 50 N is pulled along a horizontal surface at constant speed by a horizontal 15 N force. μd is
0.15
0.50
3.3
0.30
2.
The maximum static friction compared with the dynamic friction on the same surfaces is typically
Larger
Smaller
Equal
Zero
3.
A 10 kg object on a rough horizontal floor has μs = 0.40. The minimum horizontal force to start it moving is
4.0 N
39 N
98 N
25 N
4.
A block just starts to slide when a plane is tilted to 30°. The coefficient of static friction is
0.50
0.87
0.58
1.7
5.
A box on a horizontal floor is pushed by a 20 N force at rest and does not move. The friction force is
0
Less than 20 N
20 N
More than 20 N
6.
A car skids to rest with μd = 0.70 on level ground. The deceleration is
6.9 m s⁻²
0.70 m s⁻²
4.9 m s⁻²
9.8 m s⁻²
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Part of Theme A — Space, Time and Motion — see every lesson and quiz in this unit.
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