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Spring 2008  Phys 5A  4/7  Lecture 2.8  50 minutes
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"The lazy manage to keep up with the earth's 
rotation just as well as the industrious."
--Mason Cooley

TODAY (*.pdf)
Pick up your Quiz 4; scores posted online
Discussion of selected questions at waiferx.blogspot.com

4/4 opinion results
     Preparation/understanding of material?

Clicker homework

Chs. 8.1, 8.3: Rotational Energy Conservation
Ch. 8.4: (Static) Equilibrium
     Ex: The balanced broom
     Ex: Problem 8.36 (finish for credit next time)
     
NEXT TIME
Homework              
     Problems 8.3 (for practice only)
              8.4
              8.8 (assume v_trans = 3.0 m/s; use v_trans = r*w to
                   find (a) K_trans of bicycle (including rider),
                   and (b) K_rot of wheels)
              8.23 (for practice only)
              8.24
              8.31 (for practice only)
              8.36 (finish for 2.0 points)
              8.37 (for practice only)
              8.39 (for practice only)

Read Ch. 8.6
          (compare Eq. (8-9) with translational Newton's second law)
          (p. 280 light-bulbs)
     Ch. 8.7
          (Conceptual Example 8.12, Practice Problem 8.12, p. 282)