Force

In physics, a force is an external cause responsible for any change of a physical system. For instance, a person holding a dog by a rope is experiencing the force applied by the rope on their hand, and the cause for its pulling forward is the force exercised by the rope. The kinetic expression of this change is, according to Newton's second law, acceleration, but non-kinetic expressions such as deformation can also occur. The SI unit for force is the newton. Force - Elementary concepts. Force in its most pr ...

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Force - History

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Force: Encyclopedia II - Force - Types of force There are four known fundamental forces in nature. Nuclear forces acting between subatomic particles Electromagnetic forces between electric charges Weak forces arising from radioactive decay Gravitational forces between masses Quantum field theory accurately models the first three fundamental forces, but does not model quantum gravity. Quantum gravity on a large scale can, howe ...

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Force: Encyclopedia - Psychic Force

Psychic Force is a Playstation game created by Taito and released by Acclaim in 1996. The game was a 3D fighter which combined the normal features of an arcade fighting game with psychic powers. There were eight characters available to choose from in the game, all deemed as 'psychic masters'. The game was released without much hype and failed to sell many copies. In 1999 a sequel was released titled Psychic Force 2012 for the Sega Dreamcast. This game was later ported to the Playstation as Psychic Force 2012, featuring downgraded grap

Force: Encyclopedia - X-Force

Cover to X-Force Vol. 2 #1 (August 2004). Art by Rob Liefeld. X-Force was a Marvel Comics superhero team, featured in an eponymous monthly series from 1991 until 2002 and a miniseries running from late 2004 to 2005. It was one of many spin-offs of the popular X-Men franchise. The first X-Force - the group most commonly associated with the name - grew out of the X-Men's 1980s junior team, the New Mutants. Led by the gun-toting cyborg Cable, X-Force was generall ...

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X-Force - The Original X-Force

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Force: Encyclopedia - Canadian Forces

The Canadian Forces (French: Forces canadiennes) are the combined armed forces of Canada. The operational elements of Canadian Forces are: Canadian Forces Land Force Command, (army); Canadian Forces Maritime Command, (navy); and Canadian Forces Air Command, (air force). The Canadian Forces was formed on February 1, 1968, when the Canadian government merged the Canadian Army, the Royal Canadian Navy and the Royal Canadian Air Force into a unified structure. Canada remains one of the few modern m ...

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Canadian Forces - History

Canadian Forces - Command structure

Canadian Forces - Uniforms

Force: Encyclopedia - Centripetal force

An object that moves in a circular path undergoes a continuous acceleration towards the center of the circle. The net force that causes this acceleration is called a centripetal force (from Latin centrum "center" and petere "tend towards"). This term refers to the effect of the force (namely, to maintain the circular motion of the object); the origin of the centripetal force can be anything that causes a force to exist. An object can travel in a circle with a constant speed only if the net force acting on i ...

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Force: Encyclopedia - Labor force

In economics the labor force is the group of people who have a potential for being employed. Normally, the labor force consists of everyone above a certain age (around 14 to 16) who are participating workers, that is people actively employed or seeking employment. People not counted include students, retired people, stay-at-home parents, people in prisons or similar institutions, as well a ...

Force: Encyclopedia - American Expeditionary Force

The American Expeditionary Force or AEF was the United States military force in World War I. The AEF helped the French defend the Western Front during the Aisne Offensive in May. US President Woodrow Wilson initially planned to give command of the AEF to General Frederick Funston, but after Funston's sudden death, Wilson appointed General John J. "Black Jack" Pershing in May 1917, who oversaw US forces throughout the war. Pershing insisted that American soldiers be trained before going to Europe. As a result, few troops ...

Force: Encyclopedia - Centrifugal force

Centrifugal force stems from Latin centrum "center" and fugere "to avoid". In Newtonian physics [1] it is the inertial reaction force to the centripetal force that induces curved motion. The term "centrifugal force" is also used to mean one of the fictitious forces that appears to act on an object when its motion is viewed from a rotating frame of reference, when pretending that it is an inertial frame. A classic example of centrifugal force in action is a passenger riding in a car. The car is ...

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Force: Encyclopedia - Air Force One

Air Force One is the air traffic control call sign of any U.S. Air Force aircraft carrying the President of the United States. Since 1990, the presidential fleet has consisted of two specifically configured, highly customized Boeing 747-200B series aircraft—tail numbers 28000 and 29000—with Air Force designation VC-25A. While these planes are only referred to as "Air Force One" while the president is on board, the term is commonly used to describe either of two aircraft normally used and mainta ...

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Air Force One - Sources and further reading

Air Force One - Notes

Force: Encyclopedia - Border Security Force

The Border Security Force (BSF), established on December 1, 1965, is responsible for guarding India's land borders during peacetime and preventing trans-border crimes. It is a Central paramilitary force operating under the Union Ministry of Home Affairs. The Indian Union has a federal structure and is made up of several states, much like the United States. From independence in 1947 to 1965, India's international boundaries were manned by the Armed Police battalions of each Indian state sharing a border with a neighbou ...

Force: Encyclopedia - Atomic force microscope

The atomic force microscope (AFM) is a very powerful microscope invented by Binnig, Quate and Gerber in 1986. Besides imaging it is also one of the foremost tools for the manipulation of matter at the nanoscale. The AFM consists of a cantilever with a sharp tip at its end, typically composed of silicon or silicon nitride with tip sizes on the order of nanometers. The tip is brought into close proximity of a sample surface. The Van der Waals force between the tip and the sample leads to a deflection of the cantilever according t ...

Force: Encyclopedia - Weak nuclear force

The weak nuclear force or weak interaction is one of the four fundamental forces of nature. It is most commonly seen in beta decay and the associated radioactivity. The predicate weak derives from the fact that the field strength is some 1013 times less than that of the strong nuclear force. The term nuclear indicates that it is a short-range force, limited to distances smaller than an atomic nucleus. Weak nuclear force - Properties. The weak nuclear force affects all leptons ...

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Force: Encyclopedia - American Forces Network

American Forces Network (or AFN) is the brand name used by the United States Armed Forces Radio and Television Service (AFRTS) for its networks worldwide. American Forces Network - Organization. American Forces Network (AFN) is the operational arm of the American Forces Radio and Television Service (AFRTS), an agency of the American Forces Information Service (AFIS), and is under the operational control of the Office of the Assistant Secretary of Defense for Public Affairs (OASD-PA). This broa ...

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American Forces Network - After World War II

American Forces Network - Media Services

American Forces Network - AFN programming

Force: Encyclopedia II - Air Force Security Forces - Security Forces Training

Air Force Security Forces Training now lasts 65 (academic) days instead of 51, and teaches security forces students about missile security, convoy actions, capture and recovery of nuclear weapons, law enforcement, directing traffic and nonlethal tactics such as Weapons Retention, PART (Physical Apprehension Restraint Techniques) and pressure points on a body, As well as Airman infantry skills. These new training guidelines were implemented by Brig. Gen. Mary K. Hertog, after witnessing Security Forces Airmen in the field in Iraq, and realizi ...

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