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

Practise resolving forces in contact, elevator and accelerating-block problems using free-body diagrams and resultant force.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • Identify the two bodies in a force interaction and state the direction and physical origin of the force each body exerts.
  • Determine the contact force between coupled bodies from the applied force, masses and common acceleration.
  • Explain how vertical contact forces balance or produce acceleration in situations such as a sledge, lift or load.

Learn this topic

Study A.2.2—Forces as interactions between bodies conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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

[Maximum number: 1]

An elevator (lift) and its load accelerate vertically upwards.

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

Which statement is correct in this situation?

A

The net force on the load is zero.

B

The tension in the cable is equal but opposite to the combined weight of the elevator and its load.

C

The normal reaction force on the load is equal but opposite to the force on the elevator from the load.

D

The elevator and its load are in translational equilibrium.

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