BESARAN FISIKA

Introduction

This tutorial provides a comprehensive overview of physical quantities, including their definitions, types, and examples of both fundamental and derived quantities. Understanding these concepts is essential for students studying physics, as they form the foundation for further learning in the subject.

Step 1: Understand the Definition of Physical Quantities

• What are Physical Quantities?

  • Physical quantities are properties that can be measured or calculated in physics. They are essential for expressing physical laws and conducting experiments.

• Key Characteristics:

  • Measurable: They can be quantified using appropriate units.
  • Represent physical properties: They describe characteristics of objects or phenomena.

Step 2: Differentiate Between Types of Physical Quantities

• Fundamental Quantities:

  • These are the basic quantities that are defined independently. Examples include:
    • Length (meter)
    • Mass (kilogram)
    • Time (second)
    • Electric Current (ampere)
    • Temperature (kelvin)
    • Amount of Substance (mole)
    • Luminous Intensity (candela)

• Derived Quantities:

  • These are quantities that can be expressed in terms of fundamental quantities. Examples include:
    • Velocity (length/time)
    • Acceleration (length/time²)
    • Force (mass × acceleration)
    • Energy (force × distance)

Step 3: Familiarize Yourself with Examples of Physical Quantities

• Examples of Fundamental Quantities:

  • Length: The distance from one point to another, measured in meters.
  • Mass: The amount of matter in an object, measured in kilograms.

• Examples of Derived Quantities:

  • Speed: How fast an object moves, calculated as distance divided by time (e.g., meters per second).
  • Pressure: The force applied per unit area, calculated as force divided by area (e.g., pascals).

Step 4: Recognize the Importance of Units in Measuring Physical Quantities

• Understanding Units:

  • Units provide a standard for measuring physical quantities. The International System of Units (SI) is the most commonly used system.

• Common Units:

  • Length: Meter (m)
  • Mass: Kilogram (kg)
  • Time: Second (s)

• Using Formulas:

  • When calculating derived quantities, always ensure that the units are consistent. For example, if calculating force, use:

    Force (F) = Mass (m) × Acceleration (a)
    

Conclusion

In summary, physical quantities are fundamental to understanding physics. They can be categorized into fundamental and derived quantities, each with specific units of measurement. By grasping these concepts, you will build a strong foundation for your studies in physics. Next, consider exploring how these quantities relate to real-world applications in various scientific fields.