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IB Physics HL A 2 2 Forces As Interactions Between Bodies Questions

Practise analysing coupled blocks, frictional forces and multi-stage motion with Newton’s laws.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Identify forces as interactions between bodies, specifying the two interacting bodies and the force direction.
  • Represent interaction pairs and distinguish contact from non-contact forces using complete diagrams and mark-scheme evidence.

IB Physics HL A 2 2 Forces As Interactions Between Bodies Questions question 1

[Maximum number: 3]

A girl on a sledge is moving down a snow slope at a uniform speed.

Figure for Question IB Physics HL A 2 2 Forces As Interactions Between Bodies Questions question 1 — IB Physics HL

After leaving the snow slope, the girl on the sledge moves over a horizontal region of snow. Explain, with reference to the physical origin of the forces, why the vertical forces on the girl must be in equilibrium as she moves over the horizontal region.

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