Nounforces Verbforces
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Verbforces
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From Wiktionary under the GNU Free Documentation License. In physics, a force is any influence that causes a free body to undergo an acceleration. Force can also be described by intuitive concepts such as a push or pull that 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. A force has both magnitude and direction, making it a vector quantity. Newton's second law, F=ma, can be formulated to state that an object with a constant mass will accelerate in proportion to the net force acting upon and in inverse proportion to its mass, an approximation which breaks down near the speed of light. Newton's original formulation is exact, and does not break down: this version states that the net force acting upon an object is equal to the rate at which its momentum changes. Related concepts to accelerating forces include thrust, increasing the velocity of the object, drag, decreasing the velocity of any object, and torque, causing changes in rotational speed about an axis. 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. Philosophers in antiquity used the concept of force in the study of stationary and moving objects and simple machines, but thinkers such as Aristotle and Archimedes retained fundamental errors in understanding force, due to an incomplete understanding of the sometimes non-obvious force of friction, and a consequently inadequate view of the nature of natural motion. Most of the previous misunderstandings about motion and force were eventually corrected by Sir Isaac Newton; with his mathematical insight, he formulated laws of motion that remained unchanged for nearly three hundred years. By the early 20th century, Einstein developed a theory of relativity that correctly predicted the action of forces on objects with increasing momenta near the speed of light, and also provided insight into the forces produced by gravitation and inertia. With modern insights into quantum mechanics and technology that can accelerate particles close to the speed of light, particle physics has devised a Standard Model to describe forces between particles smaller than atoms. The Standard Model predicts that exchange particles called gauge bosons are the fundamental means by which forces are emitted and absorbed. Only four main interactions are known: in order of decreasing strength, they are: strong, electromagnetic, weak, and gravitational. High-energy particle physics observations made during the 1970s and 1980s confirmed that the weak and electromagnetic forces are expressions of a more fundamental electroweak interaction. From Wikipedia under the
GNU Free Documentation License Forces of Geek: ABC Announces Latest "Stars" For DANCING WITH THE ...
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Sun, 05 Sep 2010 11:56:47 GMT+00:00 Xinhua 5 (Xinhua) -- The Israeli cabinet on Sunday approved Israel Defense Forces (IDF) Southern Command Chief, Maj.- Gen. Yoav Galant as the next chief of staff. ... Government approves Galant appointment Ynetnews Israel picks Gaza war commander as new military chief afp israel approves Yoav Galant as new military chief Sify www.worldbulletin.net 2010 Armed Forces Bowl moving to SMU - ESPN
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432px x 576px | 68.70kB [source page] We use different teaching styles and let the children learn individually in pairs and groups to solve problems or answer questions From Yahoo Image Search: "forces" What are the physical forces that act on an airplane? Q. What are the physical forces that act on an airplane? For Example: Gravity, Normal force, etc. Please be specific when giving answers. I would also like to know about the safety risks associated with flying, and please focus on the physics of an airplane. Really appreciate any help! Asked by AYALEWNATOR - Sat Mar 15 12:27:09 2008 - - 2 Answers - 0 Comments A. There are 4; Lift Thrust Weight Drag Lift must be larger than weight and thrust must be larger than drag for the airplane to fly. Some physical risks are metal fatigue, weather, pilot error... Answered by Blue Sky - Sat Mar 15 12:32:03 2008 What force or forces constitute the fundamental source of energy that generates wind movement and circulation? Q. 8 Please only respond if you are positive of your answers please, i cannot afford to get any questions wrong thanks! What force or forces constitute the fundamental source of energy that generates wind movement and circulation? Choose one answer. a. Pressure differences in the atmosphere b. Radiant energy of the Sun c. Coriolis Effect d. All of the above Asked by Jack H - Sat Mar 7 23:32:12 2009 - - 1 Answers - 0 Comments A. I am 99.9% sure that the answer is d. All of the above. Pressure differences in the atmosphere generate wind movement by pushing wind from high pressure to low pressure. Radiant energy from the Sun generates wind movement by creating uneven heating of the Earth's atmosphere and surface. The Coriolis Effect circulates wind because the air moves over the surface of the Earth while the planet itself is rotating under it. Answered by Press Your Luck - Wed Mar 11 20:42:14 2009 What are the forces that act on a mass hanging from a spring scale?
Q. There is no specific mass, I just need to know the forces that act on a simple spring scale like the ones you would use at a supermarket to weight something. I already know gravity. Anything would be helpful. Asked by Yassi b - Sun Nov 22 15:33:49 2009 - - 4 Answers - 0 Comments A. Tension, and Gravity Answered by Alexm4041 - Sun Nov 22 15:53:59 2009 From Yahoo Answer Search: "forces" |






