A 8 slide power point presentation that can be used for any elementary grade level introduction to forces and motion. It is complete with pictures, a couple of links to Brain Pop videos, information, and questions to progress monitor as you go along. This specifically correlates/aligns with the Standards of Learning for Virginia (4th grade) 4.2. However, it could be used or easily modified for any instruction.
The last slide has a link to a "virtual experiment" that will add to your friction discussion.