Fundamental and derived physical quantity with examples
Fundamental Physical Quantities:
- These are basic measurements like length, mass, time, electric charge, and temperature that can't be described by other measurements.
- These measurements are used as the standard for all other physical measurements.
- The units used for these measurements are the same everywhere in the world.
Derived Physical Quantities:
- These are measurements that can be described by combining or changing fundamental physical quantities.
- Examples of derived physical quantities are speed, velocity, acceleration, force, and energy.
- The units for these measurements are based on the units of the fundamental physical quantities used to create them.
- Understanding derived physical quantities is important for understanding how physical things and events work.
Examples for Both:
- Length (fundamental quantity) is used to express the size of an object or the distance between two points.
- Speed (derived quantity) is expressed as the distance traveled per unit of time and is calculated as the ratio of displacement to time.
- Force (derived quantity) is expressed as the product of mass and acceleration and is used to describe the interaction between objects.
- Energy (derived quantity) is expressed as the ability to do work and is calculated as the product of force and distance.
