Q:

# What is a derived unit?

A:

In physics, aÂ derived unit is a unit expressedÂ algebraically usingÂ base units. In the metric system, the SI base units for length, mass, time and electric current are respectively meter, kilogram, second and amp. Some derived units from these base units are area, volume, density, acceleration and frequency.

## Keep Learning

For example, area and volume are derived from the length unit meters because the unit of measurement for area is square meters and volume is cubic meters. Similarly, the unit measurement used for density is kilograms per cubic meter and for velocity it is meters per second. In physics, there are many other derived units, such as specific volume, electric conductivity and frequency.

Derived units can be dimensionless or expressed in terms of two base units. An example of a derived dimensionless unit is the refractive index while meters/second squared for acceleration is given using two base units.

Sources:

## Related Questions

• A: Energy, the ability of a system to do work, has a variety of measurement units, but the most basic unit of energy is the joule. Named after James Joule, th... Full Answer >
Filed Under:
• A: The work of Sir Isaac Newton revolutionized science and laid the foundations of modern mathematics and physics. Among his accomplishments are the formulati... Full Answer >
Filed Under:
• A: Khan Academy has an extensive video library of physics lessons available online for free. The lessons range from basic one-dimensional motion to more advan... Full Answer >
Filed Under:
• A: Albert Einstein studied physics. He became famous for developing the theory of relativity and for conducting extensive research on the Brownian movement of... Full Answer >
Filed Under:
PEOPLE SEARCH FOR