"Free AP Physics Help for AP Physics C or
Introductory College Physics
Mechanics and Electricity and Magnetism"
Here are some youtube videos to give you some explanations of AP Physics C topics to help with AP physics.
Engineering Interact is a site for elementary school students designed by the Department of Engineering at the University of Cambridge. Engineering Interact offers five games designed to teach students physics concepts. The games address concepts related to light, sound, motion, electricity, and space travel. Each of the five games presents students with a scenario in which they have to "help" someone solve a problem. The games require students to learn and analyze the information presented to them.