MasteringPhysics1b

MasteringPhysics1b - MasteringPhysics: Assignment Print View

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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignmentI. .. 1 of 8 10/4/2007 3:27 PM [ Print View ] PHCC 141: Physics for Scientists and Engineers I - Fall 2007 1b. Vectors Due at 11:59pm on Monday, August 27, 2007 Hide Grading Details Number of answer attempts per question is: 10 You gain credit for: correctly answering a question in a Part, or correctly answering a question in a Hint. You lose credit for: exhausting all attempts or requesting the answer to a question in a Part or Hint, or incorrectly answering a question in a Part. Late submissions: reduce your score by 14.3% over each day late. Hints are helpful clues or simpler questions that guide you to the answer. Hints are not available for all questions. There is no penalty for leaving questions in Hints unanswered. Grading of Incorrect Answers For Multiple-Choice or True/False questions, you lose 100% / ( # of options - 1 ) credit per incorrect answer. For any other question, you lose 3% credit per incorrect answer. These problems concern vector addition and subtraction Vector Addition in a Unit Cell In nature, substances often possess a crystalline structure. The basic component of a crystal is the unit cell, such as the rectangular parallelpiped illustrated in the figure . (For the purposes of this problem, take , , and to be positive.) Find the following quantities. When the question asks for a vector, express your answer as an ordered triplet. That is, a vector with length in the x direction, length in the y direction, and length in the z direction should be written as . Part A What is the vector from point O to point E? ANSWER: = Part B What is the vector from point O to point F? ANSWER: = Part C What is the vector from point O to point C? ANSWER: = Part D Hint D.1 How to use the components Add the components separately. ANSWER: =
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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignmentI. .. 2 of 8 10/4/2007 3:27 PM Part E Hint E.1 The meaning of | | Hint not displayed Hint E.2 Length of a vector A vector whose x , y , and z components are, respectively, , , and has a length equal to . ANSWER: | | = Part F Hint F.1 Consider geometry Hint not displayed ANSWER: | | = Part G ANSWER: | | = This is a long problem designed to show the maxim: Think geometrically, manipulate with components. Geometric vs Componentwise Vector Addition Learning Goal: To understand that adding vectors by using geometry and by using components gives the same result, and that manipulating vectors with components is much easier. Vectors may be manipulated either geometrically or using components. In this problem we consider the addition of two vectors using both of these two methods.
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MasteringPhysics1b - MasteringPhysics: Assignment Print View

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