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SCIENCE 101 5.1.5 Explore: Breaking Boards Exploration Physics Sem 1 Points Possible: 25

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SCIENCE 101 5.1.5 Explore: Breaking Boards Exploration Physics Sem 1 Points Possible: 25 In this practice, you will apply what you have learned in the lesson. Answer the questions below. Sub ... mit this to your teacher when you are done. 1. Use this article to answer questions about the physics of breaking objects with a bare fist. (11 points) a. Who are Michael Feld and Ronald McNair, and what is their expertise on the topic? (3 points) b. What two things did Feld and McNair believe were the secret to karate? What did they learn about the speed of beginning students versus those with a black belt? (4 points) c. Besides force, what else is crucial to achieve maximum momentum in a karate chop? At which point does this maximum momentum occur? (2 points) d. What is elastic limit? How does the elastic limit of our bones compare to that of concrete? (2 points) 2. Use this article to answer questions about how concrete bricks can be broken using karate. (9 points) a. What two aspects of the io9 article on breaking concrete blocks does the author say are incorrect? (2 points) b. Why are students told to aim several inches beyond the actual object they are trying to break? Give two reasons. (2 points) c. Read the paragraph on understanding brick breaking, which is a quote from a children's TV show about science. What is the force (in pounds) of McNair's hand when it hits the concrete brick? How does this compare to the force (weight) that a concrete brick can withstand? How is it possible for McNair to break the concrete brick? (3 points) d. List two ways breakers increase their likelihood of breaking the boards. (2 points) 3. Use this link to answer questions about the karate blow. (5 points) a. Look at the impulse equation. Why does a shorter time of impact result in a greater force? (3 points) b. Why are pencils placed between boards when trying to break several boards at once? Give two reasons. (2 points) [Show More]

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