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Spring 2008  Phys 5A  3/31  Lecture 2.5  50 minutes
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"When a book and a head collide and there is a 
hollow sound, is it always from the book?"
--Georg Christoph Lichtenberg

TODAY (*.pdf)
Clicker homework

Pick up your Midterm 1; scores posted online
Discussion of selected questions at waiferx.blogspot.com
In-progress grades (up until Midterm 1) posted online

Ch. 7.4: Conservation of Momentum (*.pdf)
     Ex: Problem 7.18
         Shooting recoil movie
         (military.com)
         
Ch. 7.7: Collisions in One Dimension
     Ex: Perfectly inelastic airtrack collision
         (Deer Valley High School Science Department)
     Ex: Elastic(?) people collision
         (YouTube.com)
     Air track applet 
         ("e" = 1 for elastic collisions)
         ("e" = 0 for perfectly inelastic collisions)         
     
NEXT TIME
Homework
     Problems 7.42
              7.39 (for practice only)
              7.47 (for practice only)
              7.49 (for practice only)
              7.52

**Review elastic/inelastic/perfectly inelastic definitions, p. 240**

Problem-solving session (2.0 points)
     Problem 6.80 (hint: total speed includes v_x and v_y components)
     (attempt before, work on during, and submit at end of next class)