2.1. Mechanical Properties

Try these first

1. 1.

   Define tensile strength.

   Hint

   Think about how much you can pull on a rope before it snaps.

2. 2.

   What is impact resistance?

   Hint

   Consider why sports helmets are made from certain types of plastics.

3. 3.

   What does tensile strength measure?

   • Impact resistance
   • Stretching stress
   • Deformability

   Hint

   Think about materials that you can pull without them breaking.

4. 4.

   True or False: Thermosetting plastics are generally more impact resistant than thermoplastics.

   • True
   • False

   Hint

   Remember the applications of flexible plastics.

5. 5.

   Imagine you need to select a plastic for a safety shield in a sports arena. Discuss how you would consider tensile strength, impact resistance, and creep in your decision-making.

   Hint

   Focus on the type of forces and stresses that the shield would face.

6. 6.

   Evaluate a scenario where a plastic beam is used in constructing a load-bearing ceiling. Discuss the implications of creep on its longevity.

   Hint

   Consider how long-term loading can affect materials.