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IB Physics HL A 2 5 Contact Forces Questions

Practise IB Physics HL A.2.5 by analysing the contact force transmitted between coupled bodies moving with a common acceleration.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Determine the contact force exerted between two bodies in contact from their common acceleration and the applied force, using a free-body or resultant-force model.

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Study A.2.5—Contact forces conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Physics HL A 2 5 Contact Forces Questions question 1

[Maximum number: 1]

The diagram shows two blocks of mass m and M in contact on a frictionless surface. A force F is applied on the block of mass m and causes the blocks to move with an acceleration a.

Figure for Question IB Physics HL A 2 5 Contact Forces Questions question 1 — IB Physics HL

What is the force that the block of mass M is exerting on the block of mass m ?

A

m a

B

Ma

C

(M+m) a

D

mM+ma\frac{m}{M+m} a

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