Physics I [Phys 161]                                    Spring 2005 Assignment #5 Reading, Vocabulary & Objectives A. Availability and Due Dates Assignment #5 is available Monday, March 7, 2005.  The target date for its successful completion is Friday, March 18, 2005.  In any event, all Mandatory Homework problems from Assignment #5 must be successfully completed and turned in by 5:00 pm on Wednesday, March 30, 2005.  If this requirement is not met, the student will not be allowed to take Exam 3, to be given in class on Thursday, March 31, 2005.   B. Reading As preparation for completing the problems in Assignment #5, read Chapters 8 and 9 in Knight. C. Vocabulary As part of Assignment #5, the following vocabulary words must be understood and memorized: Internal Force, External Force, Isolated (or Closed) System, Conservation Law, Conserved Quantity, Impulsive Force, Impulse, Linear Momentum, Perfectly Inelastic Collision, Angular Momentum, Relative Velocity, Classical Relativity, Galilean Transformation. D. Objectives In addition to the Objectives listed on Assignments #1- #4, after completing Assignment #5, the student should Know the definitions of those quantities listed in the vocabulary section above. Know the SI units in which any of the “dimensionful” quantities in the vocabulary section above are measured. Know the definition of linear momentum, and understand that total linear momentum is conserved in any system free from external forces.  Be able to calculate the time evolution of the linear momentum of a system not free from external forces. Understand what is meant by the term Impulse, and be able to calculate it given sufficient information. Be comfortable with rotational kinematics in three dimensions.  It should be possible for the student to communicate this comfort both algebraically and graphically.  It particular, the student should be able to represent rotational quantities as vectors. Understand that there is a relationship between symmetries in nature and conserved quantities.  Know the symmetries responsible for conservation of energy, conservation of linear momentum, and conservation of angular momentum. Be able to use the conservation of linear momentum to solve problems involving translation and/or rotation. Know that the tension in a massless string does not vary from point to point.  The student should also be able to explain why this is true. Know that massless, frictionless pulleys redirect tension forces without changing their magnitude.  The student should also be able to explain why this is true.