Subject: General Science
Book: NCERT Science Class 8
Force is a push or pull acting on an object.
- **Types of Forces**:
- Contact force (friction).
- Non-contact force (gravity, magnetic force).
- **Effects of Force**:
- Change in shape, direction, speed.
- **Pressure**:
- Force applied per unit area.
- Examples: Deep-sea divers wear special suits due to water pressure.
**Possible Exam Questions:**
1. Define force and give its types with examples.
2. How does pressure change with depth in liquids?
3. Explain how friction helps in daily life.
4. Why do sharp knives cut better than blunt ones?
5. How do astronauts experience microgravity?
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