Thinking With Mathematical Models Virtual Bridge Experiment Experiment 1: How is the thickness of a bridge related to it's strength? Pick a length. How many pennies does it take for a bridge to break of thickness 2 units? 3 units? 4 units? 5 units? ... Determine a way to predict the number of pennies that will be required for any thickness. Experiment 2: How is the length of a bridge related to it's strength? Pick a thickness. How many pennies does it take for a bridge to break of length 2 inches? 3 inches? 4 inches? 5 inches? ... Determine a way to predict the number of pennies that will be required for any length. Challenge: Can you determine a formula to predict the number of pennies that will be required for any thickness or length? If you experience difficulties running this activity in your browser, please see the browser help file for advice. © 2006 Applet written by S. Keller, Department of Mathematics, Michigan State University   © 2006 Connected Mathematics Project, Michigan State University and Pearson Education, Inc. publishing as Pearson Prentice Hall