Found a good link for Unit 4
http://www.antonine-education.co.uk/Physics%20A%20level/Unit_4/Oscillations/topic_2.htm, good revision notes and questions on SHM etc and links to other bits of the Unit 4 specification
http://www.antonine-education.co.uk/Physics%20A%20level/Unit_4/Oscillations/topic_2.htm, good revision notes and questions on SHM etc and links to other bits of the Unit 4 specification
