Dear Participants, assalam alaikum!!

a- Note the following proof that 2 = 1

What is wrong with this proof?

b- I posted the Mathematica program which I used yesterday on the course web-site.

Please load it on your computed, and run it [assuming you have Mathematica ß if you don’t, get yourself a copy!].

Next week, we will go into damping, and there is when we will need to use beta.

c- Below are a few interesting web-sites on Oscillatory Motion (and more!). Please take some time to browse these pages, especially the last one!

A math plotter: http://mathplotter.lawrenceville.org/mathplotter/mathPage/index.htm, and especially: http://mathplotter.lawrenceville.org/mathplotter/mathPage/sine.htm

Also,

http://www.physicssource.ca/pgs/2004_energy.html

Also,

http://physics.uwstout.edu/physapplets/

Also,

http://www.blackgold.ab.ca/ict/Division4/Science/Div.%204/Physics%2020.htm, to:

Also,

http://www.hazelwood.k12.mo.us/~grichert/sciweb/waves.htm ß somewhat advanced

Also,

http://www.falstad.com/mathphysics.html ß somewhat advanced

Also [nice, use it in the lecture]: http://webphysics.davidson.edu/physlet_resources/bu_semester1/index.html

Also,

http://hyperphysics.phy-astr.gsu.edu/HBASE/hframe.html, click mechanics, then to periodic motion, and then to pendulum, for example.