List two properties that enable rope to maintain its strength.

List two properties that made cast iron a suitable material for the Bailey Wood Plane.

The joints along railway tracks have noticeable gaps. This is not a design flaw as these gaps serve a purpose, see Figure 5.

Figure 5: The gaps along railway tracks

[Source: https://commons.wikimedia.org/wiki/File:Track_joint.jpg]

What purpose do the gaps along railway tracks serve?

A. Easy access for maintenance

B. Allow for thermal expansion

C. Ease of transportation

D. To adjust the distance between the wooden sleepers

The aircraft canopy of the fighter jet in Figure 4 allows the pilot to see out while flying. It is made from a thick polycarbonate which can absorb the impact of any debris.

Figure 4: An aircraft canopy

[Source: https://pixabay.com]

What mechanical property does this demonstrate?

A. Ductility

B. Hardness

C. Toughness

D. Plasticity

State how the plastic straw gains its stiffness.

Outline why fibres are important for the strength and flexibility of the rope.

Outline one physical property that makes hardwood a suitable choice for the base of the Gramovox^® bluetooth speaker in Figure 13.

Explain one physical property that the material used in the Zuperzozial kitchenware needs to possess.

List two properties that are required in the materials used in a smartwatch.

Define elasticity.

Figure 4 shows an example of a stress / strain graph.

Describe what happens when the stress on a material causes it to exceed its yield point.

Outline which physical property would have the greatest impact on the fuel consumption of a plane.

Outline why magneto-rheostatic smart materials would be used in the landing gear of the Boeing 787.