MP11- Forces - MasteringPhysics Assignment Print View 4:51...

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3/2/08 4:51 PM MasteringPhysics: Assignment Print View Page 1 of 11 http://session.masteringphysics.com/myct/assignmentPrint?assignmentID=1114131 [ Print View ] PHYS 2211 ABCDE Spring 08 MP11: Forces Due at 11:59pm on Sunday, January 27, 2008 View Grading Details Two Forces Acting at a Point Two forces, and , act at a point. has a magnitude of 8.20 and is directed at an angle of 62.0 above the negative x axis in the second quadrant. has a magnitude of 6.80 and is directed at an angle of 53.5 below the negative x axis in the third quadrant. Part A What is the x component of the resultant force? Hint A.1 How to approach the problem The resultant force is defined as the vector sum of all forces. Thus, its x component is the sum of the x components of the forces, and its y component is the sum of the y components of the forces. Part A.2 Find the x component of Find the x component of . Hint A.2.a Components of a vector Consider a vector that forms an angle with the positive x axis. The x and y components of are, respectively, and , where is the magnitude of the vector. Note that and if , and if . Part A.2.b Find the direction of is directed at an angle of 62.0 above the x axis in the second quadrant. When you calculate the components of , however, the direction of the force is commonly expressed in terms of the angle that the vector representing the force forms with the positive x axis. What is the angle that forms with the positive x axis? Select an answer from the following list, where 62.0 . ANSWER: Answer not displayed Express your answer in newtons. ANSWER: -3.85 Part A.3 Find the x component of Find the x component of . Hint A.3.a Components of a vector Hint not displayed Part A.3.b Find the direction of Part not displayed Express your answer in newtons. ANSWER: -4.04 Now simply add the x component of to the x component of .
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3/2/08 4:51 PM MasteringPhysics: Assignment Print View Page 2 of 11 http://session.masteringphysics.com/myct/assignmentPrint?assignmentID=1114131 Express your answer in newtons. ANSWER: -7.89 Part B What is the y component of the resultant force? Hint B.1 How to approach the problem Hint not displayed Part B.2 Find the y component of Find the y component of . Hint B.2.a Components of a vector Hint not displayed Express your answer in newtons. ANSWER: 7.24 Part B.3 Find the y component of Find the y component of . Hint B.3.a Components of a vector Hint not displayed Express your answer in newtons. ANSWER: -5.47 Now simply add the y component of to the y component of . Express your answer in newtons. ANSWER: 1.77 Part C What is the magnitude of the resultant force? Hint C.1 Magnitude of a vector Hint not displayed Express your answer in newtons. ANSWER: 8.09 A Push or a Pull? Learning Goal: To understand the concept of force as a push or a pull and to become familiar with everyday forces.
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