Edexcel A-Level Physics AS 3.3.10 Physics Implications and Context Questions

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

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

[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=\mu N

where $\mu$ 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 Edexcel A-Level Physics AS 3.3.10 Physics Implications and Context Questions 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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Edexcel A-Level Physics AS 3.3.10 Physics Implications and Context Questions question 1