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Spring 2008  Phys 5A  3/19  Lecture 2.4  50 minutes
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"One can never consent to creep when one feels an 
impulse to soar."
--Helen Keller

TODAY (*.pdf)
Clicker homework

Ch. 7.2: Momentum
     Ex: Problem 7.7 (extended)
Ch. 7.3: The Impulse-Momentum Theorem
     Ex: Problem 7.4
         Close-up of pool shot
         (billiards.colostate.edu)
     Ex: Example 7.3, p. 227 (extended)
         Airbag demonstration, Ralph Nader and friend
         (achievement.org)

NEXT TIME
Midterm 1 Announcements
     Friday, 3/21, 9:30-10:20 AM
     Bring your scientific calculator
     **USE YOUR OWN UNIQUE 4-DIGIT P.I.N.**
     **XY/ROT. "LISTS OF FIVE," BRIDGE EQUATIONS PROVIDED**
     **KNOW COMPONENTS, NEWTON'S LAWS, MECH. FORCE MAGS./DIRS.**
     Closed-book, closed-notes
     No Scantrons; circle/write answers directly on Midterm
     Five multiple-choice questions = 15 points
          No work needs to be shown; no partial credit
          (Three adapted from Spring 2008 Quizzes 1-3)
          (Other two will be extensions of above three questions)
     Two short-answer questions = 20 points
          (Conceptual questions from Chs. 2, 4)
          Partial credit given for relevant discussion
     Two worked-out problems = 40 points
          Partial credit given for approach and method
          (Spring 2008 Chs. 2-5 HW problems, lecture examples)

ANNOUNCEMENT
No class Monday-Friday, 3/24-3/28 = Spring Break

NEXT NEXT TIME (Monday, 3/31) 
Homework
     Conceptual Questions 7.2(a)-(b)
                          7.10
     Problems 7.3 (for practice only)
              7.9 (for practice only)
              7.10
     Comprehensive Problem 7.72
     
Read Chs. 7.4 (bulleted list and Eq. (7-6) on p. 231)
          7.7 (elastic/inelastic/perfectly inelastic categories;
               p. 240 box)