Robotics
Skyscrapers are rising rapidly around the world, continuously transforming city skylines. However, their repair and maintenance is becoming more and more difficult. So, who can safely perform the job? Will a friendly neighborhood ...
Nov 8, 2019
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Business
Microsoft confirmed Sunday it is in talks with Chinese company ByteDance to acquire the U.S. arm of its popular video app TikTok and has discussed with President Donald Trump his concerns about security and censorship surrounding ...
Aug 2, 2020
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Engineering
Southwest Research Institute engineers are advancing what researchers know about hypersonic flight. A new study presented at the 2019 Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting describes a series of tests ...
Oct 8, 2019
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Business
French videogame titan Ubisoft is eyeing artificial intelligence and virtual reality as the next big things in gaming, its chief executive said, especially ahead of the release of Apple's new mixed reality headset.
Jun 14, 2023
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Engineering
For more than half a century, the 1,000-foot-diameter spherical reflector dish at the Arecibo Observatory in Puerto Rico was the largest radio telescope in the world. Completed in 1963, the dish was built in a natural sinkhole, ...
Aug 15, 2023
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16
Engineering
Automation is not likely to eliminate millions of jobs any time soon—but the U.S. still needs vastly improved policies if Americans are to build better careers and share prosperity as technological changes occur, according ...
Sep 5, 2019
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Energy & Green Tech
Colorado State University professor Jennifer Bousselot is growing a garden on top of a building in Denver as part of her ongoing research into "green roofs" and her efforts to educate the public about their many benefits.
Sep 20, 2022
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Energy & Green Tech
A team of researchers have collaborated to characterize electron-hole separation in the light-absorbing layer of kesterite thin-film solar cells. This study is expected to improve the efficiency of solar cells and promote ...
May 8, 2024
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Security
The Justice Department is taking new aim at ransomware after a year that officials say was the costliest on record for the crippling cyberattacks.
Apr 21, 2021
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Business
Many aircraft are still grounded due to the coronavirus pandemic, but would-be and real pilots took to the virtual skies on Tuesday with a cutting-edge update of Microsoft's venerable Flight Simulator game.
Aug 18, 2020
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5
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
