websites for information about classical mechanics?
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The site listed below seems to have some nice web applets with  various kinematics applications and such.  I would (and did) search Google for "kinematics" to find the best. Specific searches such as "rotational motion", "Newton's laws", "1-D kinematics", "2-D kinematics", etc will yield more tuned results.
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websites aren't that trustworthy for accurate scientific advice. I'd recommend finding someone to ask in person... Wilkipedia is good for some basic things, but anything beyond Physics 101 is a crap shoot.  \n\ngood luck
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www.a729.piczo.com\nwww.murderousmaths.co.uk\nwww.bbc.co.uk/revision\nwww.bbc.co.uk/bitesize\nwww.yahoo.com
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Web: http://www.harvard.edu/\nPhysical: http://www.harvard.edu/siteguide/faqs/faq12.html
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http://integrals.wolfram.com/
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PHYSICS WEBSITES\n\nhttp://www.bcspanthers.org/physicswebsites.htm\n\nhttp://dmoz.org/Science/Physics/Education/\n\nhttp://www.refdesk.com/science.html\n\nhttp://library.thinkquest.org/10796/\n\nhttp://www.staloysius.org/Myrtle/physics/ICT%20Resources%20by%20Topic.htm\n\nhttp://www.physicsclassroom.com/\n\nhttp://www.nsf.gov/news/classroom/physics.jsp\n\nhttp://wdcrobcolp01.ed.gov/cfapps/free/displaysubject.cfm?sid=8&subid=75\n\nhttp://sps.k12.ar.us/massengale/biology%20class%20notes2.htm\n\nGood luck.\n\nKevin, Liverpool, England.
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http://www.sciencemag.org
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http://en.wikipedia.org/wiki/Theory_of_relativity
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Here is the "How Stuff Works" website devoted to cars. It has pictures of many of the mechanical systems of automobiles. Very informative.
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I'm not sure about a website that is going to give you a good introduction to nonlinear dynamics, but an excellent book is Understanding Nonlinear Dynamics by Daniel Kaplan and Leon Glass (http://www.amazon.com/gp/product/0387944400 )  For a good book relating nonlinerar dynamics to real life situtations, check out Nonlinear Dynamics and Chaos: With Applications to Physics, Biology, Chemistry and Engineering by Steven H. Strogatz (http://www.amazon.com/gp/product/0738204536 ).  \n\nHope that helps!
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A good website on quantum mechanics: http://en.wikipedia.org/wiki/Quantum_mechanics\n\nAlso, if you are intrigued by the cosmological theory of the universe, The Life of the Cosmos by Lee Smolin is an excellent read.
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http://www.howstuffworks.com/
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http://online.cctt.org/physicslab/content/EssayAnswers/search.asp\n\nor \n\napcentral.collegeboard.com
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please (2 pdf documents)\nhttp://physics.angelo.edu/~dbixler/phys3444lab4new.pdf\nhttp://physics.angelo.edu/~dbixler/phys3444lab8.pdf
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http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
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http://www.physics.gatech.edu/advancedlab/labs/frankhertz/\n\nhttp://www.physics.sfsu.edu/~rrogers/Phys%20321/5_Frank.htm\n\nhttp://www.physics.ucla.edu/demoweb/demomanual/modern_physics/quantum_mechanics_and_atomic_physics/frank_hertz_experiment.html
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try this \nhttp://www.temple.edu/classics/odysseyho.html