Homework for Friday, Oct 9.  (due in class on Friday).

<br>
From the book, Problems:
<br>
 3-12, 3-17, 3-18, 3-19,3-20

<br>
<br>
And in addition,
<br>
20) For a mass (m) hanging vertically from a spring (k)  with a natural length (l)
in gravity (g), write the equation of motion and determine the equilibrium 
position in gravity and the equation for oscillations around equilibrium. 
<br>
<br>
21) For a lightly damped harmonic oscillator (i.e., less
than critically damped),  driven by a force F=sin(wt+delta),
<br>
Show that x=D*sin(wt) can solve the equation for the right D and delta.
(What do D and delta depend on?)
<br>
Calculate AND PLOT the functions for D and delta as a function of ????.
<br>
(Let's decide what to plot them as a function of by vote, i.e., vote on what you
think is the most relevant or instructive variable to plot them "against".
<br>
What do you think?
<a href="mailto:zack@physics.ucsc.edu">
zack@physics.ucsc.edu
</a>
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