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).

Transcribed Image Text:

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