Business
The US arm of Britain's Rolls Royce won a contract worth up to $2.6 billion Friday to supply engines for the US Air Force's B-52H bomber fleet, the Air Force announced.
Sep 25, 2021
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Other
In October 2001, nearly one month after the September 11 attacks on the World Trade Center, a US Air Force pilot made history as the first person to conduct a lethal strike with a modern drone—the Predator.
Sep 7, 2021
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5
Business
The US Air Force is set to reopen a bidding war between Boeing and arch-rival Airbus over the replacement of its ageing fleet of refuelling aircraft essential to Washington's ability to project power beyond its borders.
Aug 11, 2021
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310
Security
The global police sting against organised crime revealed on Tuesday will prove a landmark in the technological arms race with the underworld, an industry expert said.
Jun 8, 2021
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Hi Tech & Innovation
A new and modern approach to understanding battlefield history may soon help prepare future military leaders in the U.S.
Dec 11, 2020
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7
Security
The use of facial recognition technology by British police has violated human rights and data protection laws, a court said Tuesday, in a decision praised as a victory against invasive practices by the authorities.
Aug 11, 2020
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Business
More than 1,600 Google workers are demanding the company "take real steps to help dismantle racism" and end its police contracts. In a letter that began circulating internally last week, workers wrote that they were "disappointed ...
Jun 23, 2020
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7
Business
Google on Wednesday announced a $175 million package to support black business owners, startup founders, job seekers and developers, along with an array of racial equity initiatives at the technology giant.
Jun 18, 2020
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11
Security
Take extra care before buying face masks or testing kits online, or responding to texts apparently sent to you by the UK government or the NHS. Because while lockdown has helped reduce the spread of the coronavirus, it is ...
Jun 3, 2020
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9
Business
Boeing outlined plans Wednesday to cut 10% of its workforce, slow production of new planes and raise more cash to survive a downturn in business that started with the grounding of its best-selling jet and has accelerated ...
Apr 29, 2020
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3
In physics, a force is any influence that causes an object to undergo a change in speed, a change in direction, or a change in shape. In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity. Newton's second law, F=ma, was originally formulated in slightly different, but equivalent terms: the original version states that the net force acting upon an object is equal to the rate at which its momentum changes.
Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object. Forces which do not act uniformly on all parts of a body will also cause mechanical stresses, a technical term for influences which cause deformation of matter. While mechanical stress can remain embedded in a solid object, gradually deforming it, mechanical stress in a fluid determines changes in its pressure and volume.
This text uses material from Wikipedia, licensed under CC BY-SA
