Here is a collection of interactive simulations  suitable for reinforcing/investigating concepts in UNIT 2 (AQA)

http://phet.colorado.edu/en/simulations/category/physics/motion

You can download them and run them on your own computer (Java required) or run them online.

Here is a superb set of simulations, to enrich and enhance the understanding of physics ….

http://www.walter-fendt.de/ph14e/