Four test strips have the same dimensions but are made from different materials. A reinforcing strip for an equipment case must withstand a force of at least 900 N without failing. The case must have the lowest possible mass.
| Material | Density in g/cm³ | Force at failure in N |
|---|---|---|
| Low-carbon steel | 7.8 | 1300 |
| Aluminium alloy | 2.8 | 800 |
| HD poly(ethene) | 0.96 | 300 |
| Carbon fibre composite | 1.6 | 1050 |
Which material should be used for the reinforcing strip?
Carbon fibre composite
Low-carbon steel
Aluminium alloy
HD poly(ethene)
118 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.