Here is a great read, thanks @Noel_Bundy for the share. The book covers Vectors, Forces, Oscillations, Particle Systems, etc. Too much to read in a day!
http://natureofcode.com/book/introduction/
Most importantly to me, it starts off with classes.
Great read indeed, very clear explained everything. Daniel Shiffman (the writer) also made a nice video lecture series if you prefer that over reading: http://vimeo.com/channels/natureofcode
@Kasper_Kamperman His video’s are a classic. He has me laughing! I think I’ve found a new comedy/educational series. If only you could write stuff this good…LOL