AP Physics Content

Physics studies energy, momentum, and charge interactions, which occur due to forces and the effects may be measured by motion. More vaguely put, Physics studies how stuff makes other stuff happen. This contrasts with chemistry, which studies how material structure determines how stuff does what it does, and biology, which studies the chemistry of life. 

Click the video at left for an 8 minute explanation of the major areas of Physics (read his vid description for a couple corrections/clarifications too).