Physics B AP Curriculum Page
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When one object moves over another, a retarding force called friction acts opposite to the direction of motion. Both surface types, the force pressing the surfaces together, and whether the objects are in motion or not each affect friction between solids.
Students pull blocks with various surfaces across various surfaces to identify the primary factors affecting friction.
I. B: Newton's laws of motion
Process Skills Checklist
- surface blocks (plain, mirrored, sandpaper)
- surface board (e.g. Masonite)
- long narrow mirror
- metal plate
- newton scales
- 200, 250, 500, and 1000 gram masses
Use caution with mirrors.