Robotics
The findings of new biomechanics research could be used to develop more effective rehabilitation techniques for patients with musculoskeletal injuries.
Oct 10, 2023
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16
Energy & Green Tech
The notion that hundreds or even thousands of electric-powered air taxis could be whisking people over jammed roads is inching away from science fiction and closer to reality.
Oct 9, 2023
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49
Machine learning & AI
The United Nations and the Red Cross this week issued a joint call for urgent new international rules to protect humanity from the potential "terrible consequences" of autonomous weapons.
Oct 6, 2023
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1
Robotics
Running on the beach versus a paved road can change an athlete's stride, speed and stability. Alter the force of gravity, and that runner may break their personal record or sink into the ground. Researchers have to consider ...
Sep 26, 2023
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46
Energy & Green Tech
A team of mechanical engineers at Beihang University, Peking University and the University of Houston has found that it is possible to capture small amounts of electricity by repeatedly squeezing treated luffa sponges. In ...
Energy & Green Tech
There is a largely untapped energy source along the world's coastlines: the difference in salinity between seawater and freshwater. A new nanodevice can harness this difference to generate power.
Sep 24, 2023
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407
Robotics
Soft inflatable robots have emerged as a promising paradigm for applications that require inherent safety and adaptability. However, the integration of sensing and control systems in these robots has posed significant challenges ...
Sep 15, 2023
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21
Engineering
The U.S. Air Force will invest $235 million to help a start-up manufacturer build a jet with a blended-wing body that officials say could provide greater range and efficiency for military tankers and cargo planes and perhaps ...
Aug 17, 2023
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3
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
Software
The landmark Broadway musical "Hamilton" has landed on Roblox, turning the innovative stage show into an immersive online environment for a new generation.
Aug 9, 2023
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1
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
