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Fall 2007  Phys 5A  10/15  Lecture 2.3  50 minutes
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"Engineering is the science of economy, of 
conserving the energy, kinetic and potential, 
provided and stored up by nature for the use of man.  
It is the business of engineering to utilize this 
energy to the best advantage, so that there may be 
the least possible waste."
--William A. Smith

TODAY (*.pdf)
Clicker homework
     [Open-notes, book open only to problems, "closed-mouth"]

Pick up your Midterm 1; scores posted online
Discussion of selected questions at waiferx.blogspot.com

Midterm 1 statistics
     Histogram/distribution
     Extrapolating your end-of-semester course grade
     Grading worksheet

Chs. 6.2, 6.4: "Non-Conservative" Work
     Ex: Conceptual Question 6.10 (extended)
Ch. 6.10: Power
     Ex: Comprehensive Problem 6.88(a)
         Yosemite Falls QuickTime panorama
         (virtualparks.org)

NEXT TIME
Homework
     Problems 6.4, 6.30, 6.66
     Comprehensive Problem 6.88(b)-(c)

(No read-ahead questions)
Read Chs. 7.2 (definition of momentum)
          7.3 (definition of impulse, relation to delta_p)