MasteringPhysics-ch 7

MasteringPhysics-ch 7 - MasteringPhysics: Assignment Print...

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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm. .. 1 of 14 10/20/07 11:28 PM [ Print View ] physics 2211 MP07: Chapter 7 Due at 5:30pm on Monday, October 22, 2007 View Grading Details Circular Motion Tutorial Learning Goal: Understand how to find the equation of motion of a particle undergoing uniform circular motion. Consider a particle--the small red block in the figure--that is constrained to move in a circle of radius . We can specify its position solely by , the angle that the vector from the origin to the block makes with our chosen reference axis at time . Following the standard conventions we measure in the counterclockwise direction from the positive x axis. Part A What is the position vector as a function of angle . For later remember that is itself a function of time. Part A.1 x coordinate What is the x coordinate of the particle? Your answer should be in terms of and . ANSWER: = Answer not displayed Part A.2 y coordinate Part not displayed Give your answer in terms of , , and unit vectors and corresponding to the coordinate system in the figure. [ Print ]
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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm. .. 2 of 14 10/20/07 11:28 PM Uniform Circular Motion A frequently encountered kind of circular motion is uniform circular motion, where changes at a constant rate . In other words, . Usually, . Part B For uniform circular motion, find at an arbitrary time . Give your answer in terms of and . ANSWER: = Part C What does become now? Express your answer in terms of , , , and unit vectors and . ANSWER: = Part D Find , a position vector at time . Hint D.1 Finding Hint not displayed Give your answer in terms of and unit vectors and/or . ANSWER: = Part E Determine an expression for the position vector of a particle that starts on the positive y axis at (i.e., at , ) and subsequently moves with constant . Hint E.1 Adding a phase Hint not displayed Part E.2 Finding a phase
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MasteringPhysics: Assignment Print View http://session.masteringphysics.com/myct/assignmentPrint?assignm. .. 3 of 14 10/20/07 11:28 PM Part not displayed Express your answer in terms of , , , and unit vectors and . ANSWER: = From this excersice you have learned that even though the motion takes place in the plane there is only one degree of freedom, angle , and that changing the initial coordinates introduces a phase angle in the equation. PSS 7.1: The Round Trip Learning Goal: To understand how to use Problem-Solving Strategy 7.1 for problems involving circular motion. A cyclist competes in a one-lap race around a flat, circular course of radius . Starting from rest and speeding up at a constant rate throughout the race, the cyclist covers the entire course in a time . The mass of the bicycle (including the rider) is . What is the magnitude of the net force acting on the bicycle as it crosses the finish line? MODEL:
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MasteringPhysics-ch 7 - MasteringPhysics: Assignment Print...

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