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Page 1 of 3 SC07A02 Unit 2 Exam Essays 287A05SP Questions 1–10: Answer the following questions. If necessary, use an equation program, such as that included in newer versions of Microsoft Word, to show your work. If you have questions about using Microsoft Word’s equation program, try searching the Microsoft Web site, located at http://office.microsoft.com/en-us/word/default.aspx. You can also use a program such as MathType to show your work with formulas, numbers, and units. You can download a free 30-day trial of MathType at http://www.dessci.com/en/products/mathtype/trial.asp. 1. The graphs below show position as a function of time for three different objects. Describe the similarities and differences of these motions. Explain your answer. 2. The graphs below show the projection of velocity as a function of time for three different objects. Compare the accelerations of the three objects. Determine whether each of these accelerations is positive or negative. Explain your answer.
Page 2 of 3 3. The graph below shows the projection of an object’s acceleration as a function of time. Graph the projections of the object’s velocity and displacement as functions of time. 4. The graph below shows the projection of an object’s velocity as a function of time. Graph the projections of the object’s acceleration and displacement as functions of time. 5. A wagon with a width of 2.4 m, moving at a speed of 15 m per second, was shot through by a bullet perpendicular to the movement of the wagon. The distance between the two bullet holes in the wagon’s walls is 6 cm. What is the speed of the bullet? 6. The driver notices that the rain leaves no trace on the back windshield of his car slanted at a 60° angle to the horizontal when the car is moving faster than 30 km per hour. Find the velocity of rain droplets. 7. The last car unfastens from a moving train. The train continues to move at the same constant speed. What is the ratio of the paths covered by the train and car up to the…