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Part III: Evidence & Reasoning:
1. Make two graphs on a separate sheet of graph paper:
a. The coefficient of kinetic friction vs. force required to ___________.
b. The coefficient of static friction vs. force required to ___________.
2. Based upon your calculations which material(s) had the highest coefficient(s) of friction?
3. Which coefficient of friction (static or kinetic) would be MOST useful in choosing a material for the sole of a shoe?
Why? (Hint: look at your free-body diagram above)
4. Which material would be most ideal for making a shoe sole based upon your evidence? Why?
5. What are some other factors that could be considered when designing the sole of a shoe?
(Hint: look at the bottom of yours and your partner's shoes!!!)
Materials
Force (N) Required to ___________:
Force (N) Required to ___________:
(Static) Coefficient of Friction
(Kinetic) Coefficient of Friction
Claim-Evidence-Reasoning: (CER) Shoe Bottoms
(student handout continued)
