In this problem you will quantitatively explore some rheologic models.

1. Using a spring scale and meter stick, graph stress against strain for several rubber bands and springs. Are these perfect Hookean bodies? Explain your answer.

2. Using a syringe and a rubber band, construct a Kelvin body (see Fig. 12.11). Suspend your Kelvin body from a horizontal bar. Using different masses, graph strain against time.

3. Place a stick of chalk horizontally across the jaws of a clamp. Suspend different masses from the chalk. Does it display elastic deformation? Determine the breaking strength of the chalk (the maximum stress it can support).

rubber band Fig. 12.11 Firmoviscous behavior simulated with a rubber band and syringe.