Notes for this topic can be freely copied from here: www.fizzics.org/Pages/Simple-harmonic-motion%2c-resonance-and-damping-notes.aspx An introduction to the concept of simple harmonic motion (SHM) with examples, including the connections between the changing forces, acceleration and velocity.The Fizzics website with many more video tutorials and free pdf notes in support is at www.fizzics.org