Browse Definitions :
Definition

mass (m)

Mass (symbolized m) is a dimensionless quantity representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram (kg).

Mass is measured by determining the extent to which a particle or object resists a change in its direction or speed when a force is applied. Isaac Newton stated: A stationary mass remains stationary, and a mass in motion at a constant speed and in a constant direction maintains that state of motion, unless acted on by an outside force. For a given applied force,large masses are accelerated to a small extent, and small masses are accelerated to a large extent. The following formula applies:

F = ma

where F is the applied force in newtons, m is the mass of the object or particle in kilograms, and a is the resulting acceleration in meters per second squared. The mass of an object can be calculated if the force and the acceleration are known.

Mass is not the same thing as weight. Weight has meaning only when an object having a specific mass is placed in an acceleration field, such as the gravitational field of the earth. At the earth's surface, a kilogram mass weighs about 2.2 pounds, for example. But on Mars, the same kilogram mass would weigh only about 0.8 pounds, and on Jupiter it would weigh roughly 5.5 pounds.

When expressing large or small masses, prefix multipliers are used.The table below shows the most common alternative mass units and their relationship to the kilogram.

Unit
(and symbol)
To convert to
kilograms, multiply by:
Conversely,
multiply by:
metric ton (T) 1000 0.001
gram (g) 0.001 1000
milligram (mg) 10 -6 10 6
microgram (µg) 10 -9 10 9
nanogram (ng) 10 -12 10 12
picogram (pg) 10 -15 10 15

See a physics video comparing mass to weight:

This was last updated in January 2016

Continue Reading About mass (m)

Join the conversation

4 comments

Send me notifications when other members comment.

Please create a username to comment.

pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles pringles
Cancel
gotta love pringles
Cancel
pringles baby
Cancel
PRINGLES
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • Whistleblower Protection Act

    The Whistleblower Protection Act of 1989 is a law that protects federal government employees in the United States from ...

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

SearchSecurity

  • challenge-response authentication

    In information security, challenge-response authentication is a type of authentication protocol where one entity presents a ...

  • Secure Shell (SSH)

    SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system ...

  • honeypot (computing)

    A honeypot is a network-attached system set up as a decoy to lure cyberattackers and to detect, deflect or study hacking attempts...

SearchHealthIT

SearchDisasterRecovery

  • virtual disaster recovery

    Virtual disaster recovery is a type of DR that typically involves replication and allows a user to fail over to virtualized ...

  • tabletop exercise (TTX)

    A tabletop exercise (TTX) is a disaster preparedness activity that takes participants through the process of dealing with a ...

  • risk mitigation

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a data center.

SearchStorage

  • exbibyte (EiB)

    An exbibyte (EiB) is a unit used to measure data capacity.

  • zebibyte (ZiB)

    A zebibyte (ZiB) is a unit used to measure computing and storage capacity.

  • tiered storage

    Tiered storage is a way to assign different categories of data to various types of storage media with the objective of reducing ...

Close