On the last day of March Crash Course launched a new series of videos about physics. The series now contains seven videos on friction, integrals, derivatives, Newton's Laws, and motion. The playlist is embedded below.
For some physics lessons that younger students might enjoy, take a look at NASA's Rocket Science 101.
To use these Crash Course videos as part of flipped lesson try EDpuzzle, VideoANT, or VideoNot.es.