Definitions [1]
Definition: Derived Quantities
Derived quantities are physical quantities that depend on and can be calculated using fundamental quantities.
Key Points
Key Points: Fundamental Forces in Nature
- Gravitational force — Force of attraction between any two masses; infinite range; weakest force (strength 10−39); acts on all objects in the universe.
- Electromagnetic force — Attractive or repulsive force between charged particles; infinite range; strength 10−2; acts only among charged particles.
- Strong nuclear force — Binds protons and neutrons together in the nucleus; short range (10−15 m); strongest of all four forces (strength = 1).
- Weak nuclear force — Responsible for radioactive decay of atoms; very short sub-nuclear range (10−16 m); strength 10−13; acts among electrons, neutrinos, and subatomic particles.
Concepts [13]
- Scope and Excitement of Physics
- Nature of Physical Laws
- Physics Related to Technology and Society
- Need for Measurement
- Units of Measurement
- The International System of Units (SI)
- Derived Quantities and Units
- Length, Mass and Time Measurements
- Accuracy, Precision and Least Count of Measuring Instruments
- Significant Figures
- Dimensions of Physical Quantities
- Dimensional Analysis and Its Applications
- Types of Forces>Fundamental Forces in Nature
