1. EGR 105 Foundations of Engineering I Fall 2007 – week 6 Project time

2. Typical Results from 2 Weeks Ago

3. Comments Curves are quite different! –Do we need to test many different lengths? Cord should have consistent properties –What is the relationship? –Can we “normalize” somehow? –e.g. twice as long does ???? as much

4. Today’s Activities Take more data: –Try unstretched lengths L, 2L, 3L (maybe just a portion of the cord) –Try 2 cords in parallel Assignment 5: –Plot new results –Try to figure out relationships –Plot “normalized” force vs stretch curve –E-mail e-notebook to me –Turn in hard copy