MasteringPhysics-ch 2

MasteringPhysics-ch 2 - MasteringPhysics: Assignment Print...

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Unformatted text preview: MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm... 1 of 20 10/20/07 10:57 PM [ Print View ] physics 2211 MP02: Chapter 2 Due at 5:30pm on Monday, October 1, 2007 View Grading Details Average Velocity from a Position vs. Time Graph Learning Goal: To learn to read and interpolate on a graph of position versus time and to change units. In this problem you must find the average velocity from a graph of . We will use the notation to indicate the average velocity over the time interval from to . Thus is the average velocity over the time interval from 1 to 3 s. Part A Find the average velocity over the time interval from 0 to 1 second. Hint A.1 Definition of average velocity The average velocity can only be defined after you specify two times: the initial time, , and the final time, . The average velocity is then defined as , which is the displacement (difference between final and initial positions, which can be negative) divided by the time interval over which the average is specified. Answer to the nearest integer. ANSWER: = 0 Part B Find the average velocity over the time interval from 1 to 3 seconds. Answer to the nearest integer. [ Print ] MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm... 2 of 20 10/20/07 10:57 PM ANSWER: = 20 Part C Now that you have and , find . Give your answer to three significant figures. ANSWER: = 13.3 Note that is not equal to the simple arithmetic average of and , because they are averages for time intervals of different length. You would have to double the weight given to because it is for an interval twice as long. Part D Find the average velocity over the time interval from 1 to 5 seconds. You will need to interpolate to find the position at time . Do not simply eyeball the position or you will likely not be able to obtain the solution to the desired accuracy. Part D.1 How to interpolate Part not displayed Round your answer to two significant figures. ANSWER: = 6.7 Part E Obtaining this answer required some interpolation on the graph. Now see if you can express this result in terms of kilometers per hour. Hint E.1 Simple method to change units Hint not displayed Hint E.2 What other conversion to use Hint not displayed Express your answer to the nearest integer. ANSWER: = 24 Part F Find the average velocity over the time interval from 2.5 to 6.0 seconds. Part F.1 Determining the displacement MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm... 3 of 20 10/20/07 10:57 PM Part not displayed Part F.2 Determining the time interval Part not displayed Express your answer to two significant figures....
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This note was uploaded on 10/11/2008 for the course PHYS 2211 taught by Professor Duncan during the Fall '08 term at Georgia Perimeter.

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MasteringPhysics-ch 2 - MasteringPhysics: Assignment Print...

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