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**Unformatted text preview: **Section 5.5 Motion 521 Version: Fall 2007 5.5 Exercises In Exercises 1- 12 , write down the for- mula d = vt and solve for the unknown quantity in the problem. Once that is completed, substitute the known quan- tities in the result and simplify. Make sure to check that your units cancel and provide the appropriate units for your so- lution. 1. If Martha maintains a constant speed of 30 miles per hour, how far will she travel in 5 hours? 2. If Jamal maintains a constant speed of 25 miles per hour, how far will he travel in 5 hours? 3. If Arturo maintains a constant speed of 30 miles per hour, how long will it take him to travel 120 miles? 4. If Mei maintains a constant speed of 25 miles per hour, how long will it take her to travel 150 miles? 5. If Allen maintains a constant speed and travels 250 miles in 5 hours, what is is his constant speed? 6. If Jane maintains a constant speed and travels 300 miles in 6 hours, what is is her constant speed? 7. If Jose maintains a constant speed of 15 feet per second, how far will he travel in 5 minutes? 8. If Tami maintains a constant speed of 1.5 feet per second, how far will she travel in 4 minutes? 9. If Carmen maintains a constant speed Copyrighted material. See: http://msenux.redwoods.edu/IntAlgText/ 1 of 80 meters per minute, how far will she travel in 600 seconds? 10. If Alphonso maintains a constant speed of 15 feet per second, how long will it take him to travel 1 mile? Note: 1 mile equals 5280 feet. 11. If Hoshi maintains a constant speed of 200 centimeters per second, how long will it take her to travel 20 meters? Note: 100 centimeters equals 1 meter. 12. If Maeko maintains a constant speed and travels 5 miles in 12 minutes, what is her speed in miles per hour? In Exercises 13- 18 , a plot of speed v versus time t is presented. i. Make an accurate duplication of the plot on graph paper. Label and scale each axis. Mark the units on each axis. ii. Use the graph to determine the dis- tance traveled over the time period [0 , 5], using the time units given on the graph. 13. t (s) v (ft/s) v 5 30 50 522 Chapter 5 Quadratic Functions Version: Fall 2007 14. t (h) v (mi/h) v 5 40 20 15. t (s) v (m/s) v 5 40 20 16. t (s) v (ft/s) v 5 40 20 17. t (h) v (mi/h) v 5 40 20 18. t (s) v (m/s) v 5 40 20 19. You’re told that a car moves with a constant acceleration of 7 . 5ft / s 2 . In your own words, explain what this means. 20. You’re told that an object will fall on a distant planet with constant accel- eration 6 . 5m / s 2 . In your own words, ex- plain what this means. 21. You’re told that the acceleration of a car is − 18ft / s 2 . In your own words, explain what this means. Section 5.5 Motion 523 Version: Fall 2007 22. An observer on a distant planet throws an object into the air and as it moves upward he reports that the object has a constant acceleration of − 4 . 5m / s 2 . In your own words, explain what this means....

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