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fundamental interaction
(redirected from Four forces)

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fundamental interaction

In physics, the effect of any of the four fundamental forces—gravitational, electromagnetic, strong, and weak. All known natural forces can be traced to these fundamental interactions. Gravitation is the attractive force between any two objects that have mass; it causes objects to fall to the ground and maintains the orbits of planets around the Sun. Electromagnetic force is responsible for the attraction and repulsion between electric charges and explains the chemical behaviour of atoms and the properties of light. The strong force binds quarks together in protons, neutrons, and other hadrons and also holds the protons and neutrons of an atomic nucleus together, overcoming the repulsion of the positively charged protons for each other. The weak force is observed in certain forms of radioactive decay (see radioactivity) and in reactions that fuel the Sun and other stars.


fundamental interaction [¦fən·də¦ment·əl ‚in·tər′ak·shən]
(particle physics)
One of the fundamental forces that act between the elementary particles of matter.


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The team, which incorporates all four forces in Yorkshire and Humberside and has powers across the country, says it has seized over pounds 3.
The amnesty forms part of the Tackling Knives Action Programme, which was launched in 10 police areas in last July with Northumbria Police among four forces to be added to the scheme last November.
The West Midlands is one of four forces leading the country in 'commonsense' style policing, where the victim plays a key role in the decision-making process.
 
 
 
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