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Spring 2008  Phys 5A  2/20  Lecture 1.11  50 minutes
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"Ludwig von Beethoven had never mastered the elements 
of arithmetic beyond addition and subtraction. 
A thirteen-year-old boy whom he had befriended tried 
unsuccessfully to teach him simple multiplication 
and division."
--Jan Ehrenwald

TODAY (*.pdf)
Pick up your Quiz 2; scores posted online
Discussion of selected questions at waiferx.blogspot.com

2/13 opinion results
     How effective are problem-solving strategies?
     (Cf. Stuart E. Loucks, _Introductory Physics with 
      Algebra: Mastering Problem-Solving_)
          
Clicker homework

Chs. 3.3/3.4: Velocity, Acceleration 

Ch. 3.5: Motion of Projectiles
     Projectile velocity vector components (*.mov)
          (Western Washington University)
     Fig. 3.17: Trajectory of a projectile
     "The List of Five + One" equations (*.pdf)
     Ex: Problem 3.38(a)

NEXT TIME
Homework 
     Problems 3.21(a) (for practice only)
              3.22 (leave answers in units of mi/min)
              3.31 (for practice only)
              3.32
              3.38(b)
     Review Ch. 3.5 
     Read Ch. 4.1 
          (definition of force, net force)
          (free-body diagram steps, p. 89)