MasteringPhysics5

MasteringPhysics5 - MasteringPhysics Assignment Print View

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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignmentI. .. 1 of 13 10/4/2007 3:56 PM [ Print View ] PHCC 141: Physics for Scientists and Engineers I - Fall 2007 5. Applying Newton's Laws - Dynamics Including Friction and Circular Motion Due at 11:59pm on Monday, September 24, 2007 Hide Grading Details Number of answer attempts per question is: 5 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 100% 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. Equilibrium in two dimensions Hanging Chandelier A chandelier with mass is attached to the ceiling of a large concert hall by two cables. Because the ceiling is covered with intricate architectural decorations (not indicated in the figure, which uses a humbler depiction), the workers who hung the chandelier couldn't attach the cables to the ceiling directly above the chandelier. Instead, they attached the cables to the ceiling near the walls. Cable 1 has tension and makes an angle of with the ceiling. Cable 2 has tension and makes an angle of with the ceiling. Part A Find an expression for , the tension in cable 1, that does not depend on . Part A.1 Find the sum of forces in the x direction The chandelier is static; hence the vector forces on it sum to zero. Type in the sum of the x components of the forces acting on the chandelier, using the coordinate system shown. Express your answer in terms of some or all of the variables , , , , and . ANSWER: Part A.2 Find the sum of forces in the y direction Now type the corresponding equation relating the y components of the forces acting on the chandelier, again using the coordinate system shown. Express your answer in terms of some or all of the variables , , , , and , as well as the magnitude of the acceleration due to gravity . ANSWER:
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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignmentI. .. 2 of 13 10/4/2007 3:56 PM Pulley Problems - linear dynamics with constraints Two Masses, a Pulley, and an Inclined Plane Block 1, of mass , is connected over an ideal (massless and frictionless) pulley to block 2, of mass , as shown. Assume that the blocks accelerate as shown with an acceleration of magnitude and that the coefficient of kinetic friction between block 2 and the plane is . Part A
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This note was uploaded on 10/28/2008 for the course PH 141 taught by Professor Toki during the Fall '08 term at Colorado State.

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MasteringPhysics5 - MasteringPhysics Assignment Print View

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