Hello PF, This is my first EVER thread in this website. Excuse me for my bad english. I'm a junior high student from Thailand. Yep, you heard it, Junior high. (Studying in a Math-Sci Program) Back to the topic. Can you give me some basic ideas on simple harmonics? I've just finished circular motion and it seems to me that simple harmonics isn't as "simple" as it's supposed to be. Anything similar to Circular motion? At least just give me a guidance on where to start please. Please excuse me if i'm posting something wrong or posting in the wrong section. Help would be very appreciated.