Briefly describe the behaviour of the silly putty when subjected to a slow strain rate. 2. Briefly describe the behaviour of the silly putty when subjected to a fast strain rate 3. Briefly describe the behaviour of the silly putty during a creep test. Recall that a creep test is produced by applying a constant force and observing the change in displacement of the material over time. 4. Briefly describe the behaviour of the silly putty during a stress relaxation test. Recall that a stress relaxation test is produced by applying a constant displacement and observing the change in load/stress of the material over time. 5. Is more energy likely to be absorbed by the silly putty during a slow or fast strain rate? Briefly explain your answer. 6. Based on your observations would you classify silly putty as a viscoelastic solid.

8. In each of the diagrams below a constant shear strain y is applied to different materials labelled (a)-(e) and the resultant shear stress t is measured over time. State whether the schematic, or stress response is a viscoelastic solid or viscoelastic fluid and briefly explain why. For your answers to (c)-(e), identify the spring or dashpot that confirms your choice and explain why. (strain inputfor use in both a & b) Y (c) (a) (d) T (b) O