Friction Slide
Class 8 Science: friction
Give a block the same push on ice, glass, wood and carpet. See how far it slides, then add wheels or oil to beat friction.
Words to know
- Friction
- A force between two surfaces in contact that opposes motion.
- Sliding friction
- Friction when one surface slides over another.
- Rolling friction
- Friction when a body rolls over a surface. It is much smaller than sliding friction.
- Lubricant
- A substance like oil or grease that reduces friction between surfaces.
- Rough surface
- A surface with many bumps, which gives more friction.
Quick check
Answer 3 questions to check what you learned.
Try at home
Slide a book across a table, then across a towel, with the same push. Now put three round pencils under it. Which goes furthest?