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Edexcel A-Level Physics Practical Contexts

Practise Edexcel A-Level Physics implications and context by linking lab tests to tyre safety, aircraft wings and engineering design choices.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • explain why rubber tests matter for grip, braking distance and skid prevention
  • link strain-gauge wing measurements to safe stress limits, bending and design improvement

3.3.10 - Physics implications and context question 1

[Maximum number: 2]

When an object is in contact with a horizontal surface, there is a maximum frictional force F between the object and the surface before sliding occurs.
F is given by the equation

F=μNF=\mu N

where μ\mu is a constant and N is the normal contact force between the object and the surface.
A student investigated this relationship for a rubber block on a concrete surface. She set up the apparatus as shown in the diagram.

Figure for Question 3.3.10 - Physics implications and context question 1 — Edexcel A-Level Physics AS

A tyre manufacturer carries out similar tests on samples of the rubber used for tyres.

Suggest why these tests are necessary.

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