Physics Formulas for the chapter-Friction
Apr 26, 2022, 16:45 IST
Chapter-Friction of class 8 Science
Friction
The force which comes to act along the direction tangential to the, 3 Surfaces in contact and opposes the relative motion.
Causes of friction
- Rough surface
- Opposing force
- Application of external force
Types of Friction
There are three types of friction:
- Static friction
- Dynamic or Kinetic friction
- Rolling friction
Relation
Static friction > sliding friction > Rolling friction
Advantge of Friction
- Walking
- Sticking two or more bodies
- Applying brakes
- Transfer of motion
- Writing
Static friction > sliding friction > Rolling friction
Disadvantages of friction
- opposes the relative motion
- wear and tear of machinery parts
- production of heat which damages machinery
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