Electronics & Semiconductors
Researchers have developed next-generation smart textiles—incorporating LEDs, sensors, energy harvesting, and storage—that can be produced inexpensively, in any shape or size, using the same machines used to make the ...
Apr 21, 2023
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134
Engineering
Someone taps your shoulder. The organized touch receptors in your skin send a message to your brain, which processes the information and directs you to look left, in the direction of the tap. Now, Penn State and U.S. Air ...
Aug 24, 2022
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128
Robotics
Robotic body-weight support (BWS) devices can play a key role in helping people with neurological disorders to improve their walking. The team that developed the advanced body-weight support device RYSEN in 2018 has since ...
Sep 23, 2021
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79
Consumer & Gadgets
It appears Apple is planning an interesting touch for a future generation of its most powerful notebook, the Macbook Pro. In a recently disclosed patent application, Apple has indicated it will introduce Force Touch to an ...
Robotics
A joint research team co-led by City University of Hong Kong (CityU) has developed a new soft tactile sensor with skin-comparable characteristics. A robotic gripper with the sensor mounted at the fingertip could accomplish ...
Mar 1, 2021
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235
Robotics
Across a vast array of robotic hands and clamps, there is a common foe: The heirloom tomato. You may have seen a robotic gripper deftly pluck an egg or smoothly palm a basketball—but, unlike human hands, one gripper is ...
Dec 15, 2021
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141
Software
Eureka Robotics, a tech spin-off from Nanyang Technological University, Singapore (NTU Singapore), has developed a technology, called Dynamis, that makes industrial robots nimbler and almost as sensitive as human hands, able ...
Nov 29, 2021
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49
Robotics
Bio-inspired robots, robotic systems that emulate the appearance, movements, and/or functions of specific biological systems, could help to tackle real-world problems more efficiently and reliably. Over the past two decades, ...
Robotics
A team of researchers at Seoul National University has created a stronger and faster hydrogel actuator by combining turgor design and electro-osmosis. In their paper published in the journal Science, the group describes their ...
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
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
