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# hmwk5 - Homework#5 Due midnight Sunday October 23 1 Give an...

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Homework #5 Due midnight Sunday October 23. 1. Give an example of a sport where the buoyant force is used to reduce drag. 2. The drag force is F = CρA ( v 2 / 2). Give sports examples that illustrate the importance of each of the four terms on the right-hand side of this equation (a total of four examples). 3. Work (a) Give a sports example of a force that does positive work. (b) Give a sports example of something that is tiring but does not involve work. (c) Give a sports example of a force that does negative work. (d) Give a sports example where the force and motion are not parallel, so only the parallel component of the force contributes to the work. 4. Examine Table 5.1 of the Lecture #9 lecture notes. (In each case, answer with a pair of objects from the table.) (a) What has a larger kinetic energy because it has a larger mass (even though it is slower)? (b) What has a larger kinetic energy because it has a larger speed (even though it is lighter)? 5. Examine Figure 5-18 in light of the principle of conservation of energy.

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hmwk5 - Homework#5 Due midnight Sunday October 23 1 Give an...

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