what is tension in physics?
816158
Tension is a force. It is an external stress tending to pull and object apart. If the force of tension is greater than the inward force of the object, then the object will stretch. Many objects, such as ropes and cables, can only be loaded with tension. If these objects are compressed, then they deform.
885747
The study of mechanics concerns the motion of physical bodies and the forces that act upon them. Most people are familiar with systems described by Newtonian mechanics - objects that sit around, move, collide, and are influenced by gravity. Mechanical energy includes things like the kinetic energy of a moving billiard ball, or the potential energy a roller coaster at the top of its track.\n\nThe physics of electromagnetism were not understood at the time of Newton, but in some situations, the mechanics (i.e. the mathematics of motion) of bodies influenced by electromagnetic forces is the same as that of those influenced by gravity. For example, two particles of opposite electrical charge experience an attractive force which is (allowing for certain idealizations) mathematically identical to the gravitational forces two passing planets experience. An electromechanical system might also involve the conversion of mechanical energy into electrical charges or magnetic fields, or vice versa.\n\nEveryday objects are composed of atoms and molecules, which to some degree, are like billiard balls that are constantly bouncing off one another. "Mechanical energy" might include the kinetic energy of these particles, or potential energy stored in the physical arrangement. For example, a compressed solid exerts pressure because electromagnetic forces between particles tend to push them apart. Compressing a solid (moving the particles "uphill" against repulsive electromagnetic forces) stores potential energy in a similar way that pushing a boulder up a hill does (moving the object uphill against the attractive gravitational force of the Earth). On the other hand, a compressed gas exerts pressure because independently moving particles collide with the walls of the container and change direction. The particle is accelerated (its velocity vector changed), and the acceleration times the mass of the particle gives the force applied. Compressing a gas changes the average kinetic energy of the particles, which is reflected in the corresponding increase in the temperature of the gas. The pressure also increases, but this is because the same number of particles have been forced into a smaller volume, so they collide more often with the walls. The force of any given collision is the same, but the number of collisions has increased.\n\nPotential energy does play a role in the pressure of a gas. During an individual collision, a gas molecule comes closer to the molecules of the container wall. The electric fields exert a force on the molecule, slowing it down and reducing its kinetic energy. This energy is temporarily stored as potential energy. Soon, the particle is nearly stationary (if it happened to approach head on), or at least, it is not approaching the wall any more. The electric fields continue to exert a force on the gas molecule. The force continues to change the velocity, and soon the molecule is moving away from the wall and gaining kinetic energy. Generally, the collision is elastic, and all of the kinetic energy is recovered and the particle continues moving with the same speed it had originally.\n\nSolid mechanics studies how rigid bodies behave in response to external forces. Fluid mechanics studies the internal motion of liquids, gases, and other forms of matter. Mechanical energy can be expended in crushing a soda can, affecting the motion and positional arrangement of its component reioufdgkljh kjhfbkjh ael;hgfljh wajh kjfrom the molecules of a solid to the molecules of a liquid when, for example, a glass of water is stirred.\n\nYou could get more information from the link below...
730943
tension force always act away from the point of contact. also tension is self adjusting (ie. tension will act only if there is there is tendency of motion like friction)
873109
Weight is the amount of force on an object and mass is the amount of matter in that object
249682
Looks like you are reading the book only. sometimes you have to get into some experiments, lab work to get better understanding.\n\nMechanics is the most Important part of physics or any dynamic structural analysis. To get better unserstanding ask your teacher to give you real time examples to solve.\n\nIf you do not understand the basics of Mechanics of materials, you'll have hard time to understand the properties and the analysis part in the future.
1093477
Physics (from the Greek, φυσικός (physikos), "natural", and φύσις (physis), "nature") is the science of the natural world, which deals with the fundamental constituents of the universe, the forces they exert on one another, and the results of these forces. Sometimes, in modern physics, a more sophisticated approach is taken that incorporates elements of the three areas listed above; it relates to the laws of symmetry and conservation, such as those pertaining to energy, momentum, charge, and parity.[1] Physicists study a wide range of physical phenomena spanning all length scales: from the subatomic particles of which all ordinary (i.e., baryonic) matter is made (particle physics) to the behavior of the material universe as a whole (cosmology).
861607
The frequency, f, of a vibrating string of m kg/m and subject to a tension of T Newtons is given by the relation\n\nf=sqrt(T/m)/2/L\n\nHence the frequency is inversely proportional to the length of the string, assuming the tension remains unchanged.\n\nThus the required length of the string is\n40*474/624=30.385 cm.
634464
area - the surface within a set of lines\n\nforce - strength or energy exerted or brought to bear
50292
plain stress, in simplest of cases, is just a force divided by the area at which it is acting upon. this could be a normal stress or tangential, which is another topic. plain strain on the other hand is deformation due to an application of force.for let's say a bar,it could be along its cross sectional area (reduction for example). i took up a subject about this last sem.
947987
Physics (from the Greek, φύσις (phúsis), "nature" and φυσική (phusiké), "knowledge of nature") is the science concerned with the discovery and understanding of the fundamental laws which govern matter, energy, space and time. That is, physics deals with the elementary constituents of the Universe and their interactions, as well as the analysis of systems which are best understood in terms of these fundamental principles. Physics is a study of the inorganic, physical world, as opposed to the organic world of biology, physiology, etc. [1] Physics overlaps with chemistry concerning the electro-chemical interactions of substances.\nCentral theories\n\nWhile physics deals with a wide variety of systems, there are certain theories that are used by all physicists. Each of these theories were experimentally tested numerous times and found correct as an approximation of nature (within a certain domain of validity). For instance, the theory of classical mechanics accurately describes the motion of objects, provided they are much larger than atoms and moving at much less than the speed of light. These theories continue to be areas of active research; for instance, a remarkable aspect of classical mechanics known as chaos was discovered in the 20th century, three centuries after the original formulation of classical mechanics by Isaac Newton (1642–1727). These "central theories" are important tools for research into more specialized topics, and any physicist, regardless of his or her specialization, is expected to be literate in them.\n\n    * Classical mechanics is a model of the physics of forces acting upon bodies. It is often referred to as "Newtonian mechanics" after Newton and his laws of motion. Classical mechanics is subdivided into statics (which models objects at rest), kinematics (which models objects in motion), and dynamics (which models objects subjected to forces). See also mechanics.\n\n    * Electromagnetism, or electromagnetic theory, is the physics of the electromagnetic field: a field, encompassing all of space, which exerts a force on those particles that possess the property of electric charge, and is in turn affected by the presence and motion of such particles. Electromagnetism encompasses various real-world electromagnetic phenomena.\n\n    * Thermodynamics is the branch of physics that deals with the action of heat and the conversions from one to another of various forms of energy. Thermodynamics is particularly concerned with how these affect temperature, pressure, volume, mechanical action, and work. Historically, it grew out of efforts to construct more efficient heat engines — devices for extracting useful work from expanding hot gases.\n\n    * Statistical mechanics, a related theory, is the branch of physics that analyzes macroscopic systems by applying statistical principles to their microscopic constituents and, thus, can be used to calculate the thermodynamic properties of bulk materials from the spectroscopic data of individual molecules.\n\n    * Quantum mechanics is the branch of mathematical physics treating atomic and subatomic systems and their interaction with radiation in terms of observable quantities. It is based on the observation that all forms of energy are released in discrete units or bundles called quanta. Quantum theory typically permits only probable or statistical calculation of the observed features of subatomic particles, understood in terms of wave functions.\n\n    * The theory of relativity, or relativity theory, is:\n\n    *\n          o A physical theory which is based on two postulates (1) that the speed of light in a vacuum is constant and independent of the source or observer and (2) that it is impossible to determine ones absolute velocity in any inertial systems and which leads to the deduction of the equivalence of mass and energy and of change in mass, dimension, and time with increased velocity — called also spec
57888
the tension is just the force of gravity(since there is a constant velocity, the forces going up must equal the forces going down.)\nso its just the mass times gravity so 79 x 9.8
47412
Surface tension is a quantity which we often deal with in daily life without realizing it. It plays a role in washing and cleaning procedures as well as in lubricants as used in automobiles and cosmetics. The only reason the Water Beetle does not drown is because it is being held up by surface tension. \nSurface tension is created through the attraction of the molecules in liquids to each other. If one views a molecule at the interior of a medium, it would be equally attracted by all neighboring molecules. The effect is that it is attracted to all sides with the same force, so that the resulting force is zero On the other hand, if a molecule is located at the surface of a liquid, the attraction from the interior of the medium works further on the one side, whereas there are no more molecules from the other side. Hence the resulting force is directed towards the interior of the liquid.\nOn the microscopic scale this causes drops of liquid to be round since the surface of the liquid is being minimized that way.\nTherefore, surface tension is defined as the energy needed to increase the surface by a defined value. Therefore, the minimum surface corresponds to the minimum energy.\nTemperature dependence of surface tension: The surface tension of liquids is affected by the temperature.
685247
The stress-energy tensor (sometimes stress-energy-momentum tensor) is a tensor quantity in physics. It describes the density and flux of energy and momentum in space, generalizing the stress tensor of Newtonian physics. It is the source of the gravitational field of General Relativity--just as mass is the source of such field in the Newtonian theory. One very important use of the stress-energy tensor is in the Einstein field equations.\n\nin the 1990s, astrophysicists used supercomputers to extend the calculations of general theory to more complex spacetime geometries, including spinning objects that no longer retain their simple, spherical symmetry. Such objects typically exhibit "axisymmetry" -- symmetry about one axis (like a football) -- or no symmetry at all. The mathematics, however, becomes very difficult to state, let alone solve analytically.
325774
http://en.wikipedia.org/wiki/Physics
443139
BOUYANCY & SURFACE TENSION
83668
There are several definitions of the word "force," but since your question is in the Other Science section, this should be the one you're looking for ---\n\nForce is a vector quantity; its size is measured in Newtons. One Newton will make a body of mass 1kg accelerate from rest to 1 metre per second, in a time of one second.
38713
well whatever force that is being exerted on the rope, that is going to be the tension. that means that all you have to do is calculate the force.  you just have to realize that not only is the gymnist accelerating, producing force, she is also overcoming the force of gravity. therefore, if you were to draw your free body diagram, you would have 2 forces pointing down, the force of gravity(mass times gravity), and this acceleration force(which would just be mass times the acceleration.  if you add these two forces together, you get the total force being exerted on the rope which is equal to the tension. here is the equation:\n\nT=F + Fg  (where T is tension, F is the force caused by the acceleration, and Fg is the force due to grabity.)\nT= ma + mg\nT= (74)(.11) + (74)(9.8)\nT= 733.3N.\n\nthis can also be done by just adding the acceleration to the acceleration due to gravity then multiplying this new acceleration by the gymnist's mass. either way you will get T=733.3N