=====
Spring 2008  Phys 5A  3/17  Lecture 2.3  50 minutes
=====
"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

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 6.8 (find (a) work done by Dirk on box, 
                        (b) work done by friction on box, 
                        (c) total work done on box; watch +/- signs!)
              6.19 (for practice only)
              6.30 (calculate RHS of energy conservation equation)
              6.63 (for practice only)
              6.64
              6.67 (for practice only)
              6.69 (for practice only)
              6.73 (for practice only)
     Comprehensive Problem 6.88(b)-(c)

Read Chs. 7.2 (definition of momentum)
          7.3 (definition of impulse, relation to delta_p)