Subject: General Science
Book: NCERT Science Class 8
Friction is the force that opposes motion between two surfaces.
- **Types of Friction**:
- Static, sliding, rolling, fluid friction.
- **Effects**:
- Causes wear and tear but helps in walking.
- **Ways to Reduce Friction**:
- Lubrication, ball bearings.
**Possible Exam Questions:**
1. What is friction? How is it useful and harmful?
2. Explain the methods of reducing friction.
3. Why does an oiled machine work more smoothly?
4. Discuss applications of friction in sports.
5. Why do athletes wear special shoes?
What is the primary function of white blood cells?
View QuestionWhich process separates light into its component colors?
View QuestionWhich is the smallest bone in the human body?
View QuestionWhich part of the brain is responsible for balance and coordination?
View QuestionWhich scientist is known for the laws of motion?
View QuestionWhat is the chemical formula of water?
View QuestionWhat type of electromagnetic radiation has the longest wavelength?
View QuestionWhich gas is released during photosynthesis?
View QuestionWhat is the main purpose of stomata in plants?
View QuestionWhat is the pH of pure water at 25°C?
View Question