Types of Physical Quantities

Introduction

• Focus on units and dimensions related to physical quantities.
• Classification of physical quantities into two main categories:
  • Fundamental Quantities
  • Derived Quantities

Fundamental Quantities

• Definition:
  • Independent physical quantities that cannot be resolved into other quantities.
• Seven Fundamental Quantities:
  1. Length
  2. Mass
  3. Time
  4. Electric Current
  5. Temperature
  6. Luminous Intensity
  7. Amount of Substance
• Key Characteristics:
  • They are independent from each other.
  • Cannot be defined in terms of other physical quantities.

Derived Quantities

• Definition:
  • Physical quantities that depend on fundamental quantities.
• Examples:
  • Speed:
    • Formula: Speed = Length (Distance) / Time
    • Relies on fundamental quantities: length and time.
  • Force:
    • Formula: Force = Mass × Acceleration
    • Acceleration depends on fundamental quantities: length and time.
• Additional Information:
  • Derived quantities can be formed by combining one or more fundamental quantities in various relations.

Conclusion

• Further discussion on fundamental and derived quantities in upcoming slides.