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WS_Science By You Activity_CER Shoe Bottoms_Final

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+ ward ' s science Page 8 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)

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