Reference Terms
from Wikipedia, the free encyclopedia
Friction
Friction is the force that opposes the relative motion or tendency of such motion of two surfaces in contact.
Note: The above text is excerpted from the Wikipedia article "Friction", which has been released under the GNU Free Documentation License.
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Matter & Energy News
March 29, 2025
Mar. 27, 2025 — Most haptic devices only deliver feedback as simple vibrations. New device applies dynamic forces in any direction to simulate a more realistic sense of touch. Small, lightweight device can enhance virtual reality, help individuals with visual ...
Mar. 25, 2025 — This a robot can walk, without electronics, and only with the addition of a cartridge of compressed gas, right off the 3D-printer. It can also be printed in one go, from one ...
Mar. 19, 2025 — A leaping robot could have application in search and rescue, construction, even forest monitoring. But how do you design a robot to stick a landing on a branch or pipe? Biologists worked with robot designers to discover how squirrels do it, and used ...
Mar. 12, 2025 — Scientists have developed an approach that combines rehabilitation robotics with spinal cord stimulation to restore movement in people with spinal cord injuries. The technology enhances rehabilitation and enables activities like cycling and walking ...
Latest Headlines
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Mar. 21, 2025 — The Mpemba effect, in which hot systems cool faster than cold ones under the same conditions, was first described by Aristotle more than 2,000 years ago. In 1963 it was rediscovered by Tanzanian ...
Mar. 27, 2025 — A new method significantly advances 3D imaging of reflective surfaces. The approach integrates techniques known from high-precision optical 3D ...
Mar. 28, 2025 — Novel artificial neurons learn independently and are more strongly modeled on their biological counterparts. A team of researchers has programmed these infomorphic neurons and constructed artificial ...
Mar. 27, 2025 — How gravity causes a perfectly spherical ball to roll down an inclined plane is part of elementary school physics canon. But the world is messier than a textbook. Scientists have sought to ...
Mar. 27, 2025 — Researchers reveal the way our legs adapt to fast movements. When people hop at high speeds, key muscle fibers in the calf shorten rather than lengthen as forces increase, which they call 'negative ...
Mar. 27, 2025 — Engineers have designed and synthesized a groundbreaking new material -- a copper-free superconducting oxide -- capable of superconducting at approximately 40 Kelvin, or about minus 233 degrees ...
Mar. 27, 2025 — Researchers have discovered brand new interference patterns in twisted two-dimensional tungsten ditelluride lattices. These so-called moir patterns can be tuned to look like periodic spots or even ...
Mar. 27, 2025 — In silico analysis of five industrial microorganisms identifies optimal strains and metabolic engineering strategies for producing 235 valuable ...
Mar. 27, 2025 — Researchers have discovered a way to protect quantum information from environmental disruptions, offering hope for more reliable future ...
Mar. 27, 2025 — Renting clothes can reduce the fashion industry's enormous environmental impact, but so far, the business models have not worked very well. The best chance of success is for a rental company to ...