Summary
Bill rubs, slides, and skids to show friction as a force that resists motion - sometimes helpful, sometimes in the way.
Viewer safety
All ages
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Teaching resources
Discussion questions
Discussion
Bill rubs, slides, and skids to show friction as a force that resists motion - sometimes helpful, sometimes in the way..
- What is friction doing when you rub your hands together?
- Why is it harder to slide something across carpet than ice?
- When is friction helpful, and when is it a problem?
Quick work-a-long
Vocabulary: friction, force, surface.
Try it: Slide a book across two surfaces (desk and carpet) and explain which had more friction.