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Force.png

In physics, a force is a push or pull that can cause an object with mass to change its velocity. Force has both magnitude and direction, making it a vector quantity. Newton's second law states that an object with a constant mass will accelerate in proportion to the net force acting upon and in inverse proportion to its mass. Equivalently, the net force on an object equals the rate at which its momentum changes. See also thrust.

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Wikipedia About Forced

Force.png

In physics, a force is a push or pull that can cause an object with mass to change its velocity. Force has both magnitude and direction, making it a vector quantity. Newton's second law states that an object with a constant mass will accelerate in proportion to the net force acting upon and in inverse proportion to its mass. Equivalently, the net force on an object equals the rate at which its momentum changes. See also thrust.

Forces acting on three-dimensional objects may also cause them to rotate or deform, or result in a change in pressure or even change volume in some cases. The tendency of a force to cause changes in rotational speed about an axis is called torque. Deformation and pressure are the result of stress forces within an object.e.g. ; .University Physics, Sears, Young & Zemansky, pp18–38

Since antiquity, scientists have used the concept of force in the study of stationary and moving objects. However, descriptions of forces by Aristotle incorporated fundamental misunderstandings, which, despite advances made by the third century BC philosopher Archimedes from studies of simple machines, persisted for many centuries. By the seventeenth century, Sir Isaac Newton corrected these misunderstandings with mathematical insight that remained unchanged for nearly three hundred years. By the early 20th century, Einstein in his theory of general relativity successfully predicted the failure of Newton's model for gravity by ushering in the concept of a space-time continuum.

The recent theory of particle physics known as the Standard Model associate forces at the level of quantum mechanics. The Standard Model predicts that exchange particles called gauge bosons are the fundamental means by which forces are emitted and absorbed. Only four main interactions are known: in order of decreasing strength, they are: strong, electromagnetic, weak, and gravitational. High-energy particle physics observations made during the 1970s and 1980s confirmed that the weak and electromagnetic forces are expressions of a more fundamental electroweak interaction.

Pre-Newtonian concepts

Aristoteles%20Louvre2.jpg

Aristotle provided a philosophical discussion of the concept of a force as an integral part of Aristotelian cosmology. In Aristotle's view, the natural world held four elements that existed in "natural states". Aristotle believed that it was the natural state of objects with mass on Earth, such as the elements water and earth, to be motionless on the ground and that they tended towards that state if left alone. He distinguished between the innate tendency of objects to find their "natural place" (e.g., for heavy bodies to fall), which led to "natural motion", and unnatural or forced motion, which required continued application of a force. This theory, based on the everyday experience of how objects move, such as the constant application of a force needed to keep a cart moving, had conceptual trouble accounting for the behavior of projectiles, such as the flight of arrows. The place where forces were applied to projectiles was only at the start of the flight, and while the projectile sailed through the air, no discernible force acts on it. Aristotle was aware of this problem and proposed that the air displaced through the projectile's path provided the needed force to continue the projectile moving. This explanation demands that air is needed for projectiles and that, for example, in a vacuum, no projectile would move after the initial push. Additional problems with the explanation include the fact that air resists the motion of the projectiles.

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News about Forced

Christian Bale forced writers to re-do 'Terminator Salvation' script

New KeralaLondon, May 12 : Christian Bale was so adamant to play the role of John Connor in 'Terminator Salvation' that he forced its writers to re-do its script, to give him a bigger part in the latest instalment in the sci-fi franchise.http://www.newkerala.com/nkfullnews-1-36989.html

Forced Makeover for Bulgaria

Novinite.comIf you are a property owner in the Bulgarian Black Sea resort of Bourgas, you will soon be forced to restore and redecorate the exterior of your home - as part of a bid by the Government to improve the city centre - and if you fail to so, legal action will be taken...http://www.novinite.com/newsletter/print.php?id=103534

Christian Bale Forced Terminator Rewrite

Teen HollywoodChristian Bale forced writers of Terminator Salvation to rework the script to give him a bigger part - as the British actor was determined to play the iconic role of John Connor in the sci-fi franchise.http://www.teenhollywood.com/d/204022/1024/christian-bale-fo...

Records: Trafficking victim forced to have sex at Pinellas club

The Tampa TribuneAt least one of the victims in a human-trafficking case investigated by the Pinellas County Sheriff's Office was brought to an exotic dance club in Pinellas County, where she was forced to dance and perform sex acts, according to jail records. Corinna Daylene Shaffer, one of three suspects arrested Saturday in the case, drove the victim from Feb. 16 to 26 to the Vegas Showgirls Nightclub, 10570 .....http://www2.tbo.com/content/2009/may/11/112007/records-human...

Bus pervert forced to sign sex register

Reading Evening PostThis sick dad has been forced to sign the sex offenders’ register after making sexual advances to a schoolgirl on a bus.http://www.getreading.co.uk/news/s/2050531_bus_pervert_force...

News about Forced

Demjanjuk in German prison for Nazi guard charges

San Francisco GateThat decision came after Israel won access to Soviet archives, which had depositions given after the war by 37 Treblinka guards and forced laborers who said "Ivan" was a different Ukrainian named Ivan Marchenko. Some identified Marchenko in ... http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2009/05/12/...

Conservatives falter in poll in Quebec and Canada

ReutersThat means he could in theory be forced by the opposition to call another election, but it would require all three opposition parties to agree to do so. Most consider a new election unlikely before the autumn at the earliest. The poll surveyed 1,004 ... http://www.reuters.com/article/bondsNews/idUSN12303810200905...

UPDATE 1-Systemax wins Circuit City e-commerce business

ReutersCircuit City, which had been the No. 2 retail player in the U.S. consumer electronics space, filed for bankruptcy protection last November, but was forced to liquidate after failing to reach a deal to sell the company. The company has sold off its ... http://www.reuters.com/articlePrint?articleId=USN12305315200...

Westpac forced to recall document

News.com.auWESTPAC Banking Corporation has been forced to recall investor presentation documents after it understated the bad debt provisioning of major rival National Australia Bank. BusinessDaily has been told by market sources that Australian and ... http://www.news.com.au/heraldsun/story/0,21985,25464935-664,...

Fine art no hedge against inflation

CNN MoneyFurthermore, several Bernie Madoff victims appear to be forced sellers at distressed prices. So it's no surprise the results of last week's auctions were lackluster. Sotheby's took in $61 million, down from $223 million last November. And Christie's ... http://money.cnn.com/2009/05/12/news/economy/art_inflation_h...

Search results for Forced

forced - Hutchinson encyclopedia article about forced

Any influence that tends to change a body's state of rest or of uniform motion in a straight line. A force is a push or a pull on an object. It will cause a stationary object to ... http://encyclopedia.farlex.com/forced

Forced disappearance - Wikipedia, the free encyclopedia

A forced disappearance occurs when force is used (by, for example, agents of a state) to cause a person to vanish from public view, followed by a refusal to acknowledge the ... http://en.wikipedia.org/wiki/Forced_disappearance

Forced Exposure Home

Large selection of underground music CDs and records, including reissues, from around the world. Browse by artist or label or download the catalog.http://www.forcedexposure.com/

forced definition of forced in the Free Online Encyclopedia.

forced. Physics caused by an external agency http://encyclopedia2.thefreedictionary.com/forced

Forced Performance Turbochargers

Forced Performance - the premier manufacturer of high performance, race proven turbochargershttp://www.forcedperformance.net/

Wikipedia results for Forced

Forced suicide - Wikipedia, the free encyclopedia

Forced suicide is a method of execution where the victim is given the choice of committing suicide or facing an alternative they perceive as worse, such as suffering torture ... http://en.wikipedia.org/wiki/Forced_suicide

Forced disappearance - Wikipedia, the free encyclopedia

A forced disappearance occurs when force is used (by, for example, agents of a state) to cause a person to vanish from public view, followed by a refusal to acknowledge the ... http://en.wikipedia.org/wiki/Forced_disappearance

Forced prostitution - Wikipedia, the free encyclopedia

Forced prostitution, also known as involuntary prostitution, is the act of performing sexual activity in exchange for money on a non-voluntary basis.http://en.wikipedia.org/wiki/Forced_prostitution

Forced migration - Wikipedia, the free encyclopedia

Forced migration (also called deracination) refers to the coerced movement of a person or persons away from their home or home region. It often connotes violent coercion, and is ... http://en.wikipedia.org/wiki/Forced_migration

Forced conversion - Wikipedia, the free encyclopedia

A forced conversion is the conversion to a religion or philosophy under duress, with the threatened consequence of earthly penalties or harm. These consequences range from job loss ... http://en.wikipedia.org/wiki/Forced_conversion
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Videos found for Forced

Mentally Ill Forced to Fight

Mentally Ill Forced to FightAlleged abuse at a Texas school for the mentally disabled is caught on tape.Flash - Video

Russian Army's "air" force

Russian Army's April 23: The economic global crisis has forced the Russian Army to cut some corners so instead of producing actual tanks, they‘re using decoys made out of balloons. (Countdown)Windows Media - Video

Gang tattoo allegedly forced on chi...

Gang tattoo allegedly forced on childApril 23: A California father is accused of forcing a gang tattoo on his 7-year-old son. KSEE's Carolyn Bruck reports. (NBC News Channel)Windows Media - Video

BANGLADESH: Flooding in Bangladesh ...

BANGLADESH: Flooding in Bangladesh forces many people to flee their homesFlooding in Bangladesh forces many people to evacuate their homes for the second time this year. Large areas of Bangladesh were again under water on Tuesday (September 11) after...MPEG 4 - Video

Johnny Damon forced out

Johnny Damon forced outBig Papi fielder choice. Johnny Damon out at 2B.Flash - Video

Answers for Forced

John PCan forced hot water radiatiors be used in a steam heat system?John PWill it work for heat? Yes. We use steam to preheat air (almost 1 million cfm in one building) and the coils used are essentially copper wrapped in aluminum fins. However there are two questions ...dsrWhy is my forced-hot-water system heating when the circulator pump is not running?dsrIt sounds like your flow control valve is stuck! The circulator pumps does not act like a valve. you said you had maintenance done. the person doing the maintenance could have turned the lever on ...just curiousCan I be forced to stay at work after my scheluled hours?just curiousYou should sit down with your boss and talk to him /her politely about your concerns. Then go from there, you would be surprised what a civilized talk can do.trrocks03What is the current "forced" retirement age for pilots?trrocks03Yes, commercial airline pilots operating under FAR Part 121 must retire on their 60th birthday. (There's no real reason for it, it's just Government policy.) They can continue to fly as a private...dearestm64What happens if a left handed is forced to use the right hand?dearestm64There is an interesting research article that came out today, that shows there is a genetic factor in left-handedness. The reason some people refuse to use their right hand is the DNA forces them to.
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