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Topic: Parallelogram of force

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Parallelogram

Josip Broz

	force - Hutchinson encyclopedia article about force (Site not responding. Last check: 2007-10-11)
		The action of an unbalanced or resultant force results in the acceleration of a body in the direction of action of the force, or it may, if the body is unable to move freely, result in its deformation (see Hooke's law).
		Force is a vector quantity, possessing both magnitude and direction; its SI unit is the newton.
		A resultant force is a single force acting on a particle or body whose effect is equivalent to the combined effects of two or more separate forces.
	encyclopedia.farlex.com /force (1230 words)

	Force - Open Encyclopedia (Site not responding. Last check: 2007-10-11)
		Force is rarely measured directly and is often confused with related concepts such as tension and stress.
		This superposition of forces, and the definition of inertial frames and inertial mass, are the empirical content of Newton's laws of motion.
		While force is the name of the derivative of momentum with respect to time, the derivative of force with respect to time is sometimes called yank.
	open-encyclopedia.com /Force_(physics) (1595 words)

	Parallelogram - Wikipedia, the free encyclopedia
		A parallelogram is a four-sided plane figure that has two sets of opposite parallel sides.
		Every parallelogram is a polygon, and more specifically a quadrilateral.
		The three-dimensional counterpart of a parallelogram is a parallelepiped.
	en.wikipedia.org /wiki/Parallelogram (203 words)

	Articles - Force (Site not responding. Last check: 2007-10-11)
		The four fundamental forces describe every observable phenomenon including the many other forces observed such as: Coulomb's force (the force between electrical charges), gravitational force (force between masses), magnetic force, frictional forces, centripetal, centrifugal, impact force, and spring force, to name a few.
		Conservative forces are equivalent to the gradient of a potential, and include gravity, electromagnetic force, and spring force.
		Another unit of force called the poundal (pdl) is defined as the force that accelerates 1 lbm at 1 foot per second squared.
	www.seekj.com /articles/Force (2223 words)

	[No title] (Site not responding. Last check: 2007-10-11)
		The borehole tangent line is the direction in which the normal force (or pressure) is applied on the drill bit 50 due to the weight on bit, as shown by the arrow WOB 57.
		The force application member 32a includes a rib member 102a that is radially movable as shown by the arrows 108a.
		As described earlier, each force application member is independently operated to control the amount of the force exerted by such member to the wellbore inside, which allows precisely controlling the drilling direction of the wellbore.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=98/34003.990107&ELEMENT_SET=DECL (4895 words)

	External Force
		Contact force is composed of normal and tangential forces; normal forces are normal to the surface of objects and usually unidirectional (e.g.
		When there are two concurrent forces (forces meeting at the same point), addition of the forces can be obtained by a parallelogram.
		is a force that is perpendicular/normal to the axis and the moment at the axis is generated by this force.
	www.bsu.edu /web/jkshim/bm/kinetics/externalforce/externalforce.htm (562 words)

	[No title] (Site not responding. Last check: 2007-10-11)
		Force is measured in the newton (N) and the force of gravity acting on a mass of 1kg.
		For the purpose of biomechanics, the force is measured on a x, y and z axes, where x is the direction of walking; y is taken as vertical; and z axis is taken to be the right-handed orthogonal axis system.
		In the parallelogram of forces, the two forces are used to draw a parallelogram, the diagonal of which shows the magnitude and direction of the resultant force.
	www.podiatry.curtin.edu.au /glossary/content.html (8936 words)

	Support apparatus - Patent 4208028 (Site not responding. Last check: 2007-10-11)
		The segmented spring acts as a single spring mounted diagonally across the parallelogram and exerts a force which is equal to the weight applied to the end of the parallelogram arm times the length of its diagonal divided by the distance between the attachment points of the parallelogram to the hinge bracket.
		A support apparatus according to claim 47 wherein the force exerted by said compressible and expandable means is equal to the weight applied to the end of said parallelogram times the length of the diagonal of said parallelogram divided by the distance between the said links of said parallelogram.
		This equivalent tension spring exerts a force which is equal to the weight applied to the end of the parallelogram times the length of the diagonal of the parallelogram along which the spring extends divided by the distance between the attachment points of links 2 and 4 on upper arm medial hinge bracket 8.
	www.freepatentsonline.com /4208028.html (6202 words)

	More on Force
		When the acceleration of free fall is equal to that used to define pounds force (now usually 9.80665 m/s²), the magnitude of the mass in pounds equals the magnitude of the force due to gravity in pounds force.
		If you borrow the acceleration which is official for defining kilograms force to define pounds force as well, then the same relationship will hold between pounds-force and kilograms-force (an old non-SI unit which we still see used).
		If a different value is used to define pounds force, then the relationship to kilograms force will be slightly different—but in any case, that relationship is also a constant anywhere in the universe.
	www.artilifes.com /force.htm (1831 words)

	Parallelogram of force
		The parallelogram of forces is a method for solving (or visualizing) the results of applying two different forces to an object.
		If we were to place another arrow at the origin with its head facing to the right, along the X axis, this would represent a force operating at right angles to the first force.
		If this force were half as strong as the first force, the arrow would be half as long.
	www.sciencedaily.com /encyclopedia/parallelogram_of_force (565 words)

	INTRO (Site not responding. Last check: 2007-10-11)
		The tendency of a force to cause rotation
		If a structure is not moving, it is in equilibrium: the sum of all the forces (or the sum of the components of all the forces) along any axis, in any direction, must be equal to zero.
		That means that all of the forces in the X direction (left and right), all of the forces in the Y direction (up and down), and all of the moments have to add up to zero.
	darkwing.uoregon.edu /~asperdt/Mechanics/Mechanics01.htm (976 words)

	Algebraic Methods of Coplanar Force Resolution
		A force can be resolved into an infinite number of combinations of components by the parallelogram method.
		The rectangular components may be determined graphically, where the force is shown as a vector, or algebraically.
		This principle is very useful for resolving multiple groupings of forces into a single force in order to simplify the calculation of reactions at the supports of a member or structure.
	web.mit.edu /4.441/1_lectures/1_lecture9/1_lecture9.html (435 words)

	Coplanar Force Resolution
		When forces are being represented as vectors, it is important to should show a clear distinction between a resultant and its components.
		When this force is added to the force system, the sum of all of the forces is equal to zero.
		A non-concurrent or a parallel force system can actually be in equilibrium with respect to all of the forces, but not be in equilibrium with respect to moments.
	web.mit.edu /4.441/1_lectures/1_lecture7/1_lecture7.html (1259 words)

	EM 274 - Objectives/Concurrent Force Systems - 1 (Site not responding. Last check: 2007-10-11)
		Determines the tendency of the force to cause the body to rotate.
		Be able to calculate the magnitude and direction of the resultant of a pair of concurrent forces using the parallelogram law of addition, the law of sines, and the law of cosines.
		Be able to calculate the components of a given force using the parallelogram law of addition, the law of sines, and the law of cosines.
	www.public.iastate.edu /~statics/objectives/ch022.html (157 words)

	Adjustable basketball backboard support system - Patent 5720679 (Site not responding. Last check: 2007-10-11)
		An adjusting link is a pivotally attached to an extension on one of the parallelogram links, is adjustably mounted to the support member and is weighted to act as a counter balance force to the weight of the basketball backboard to reduce the effort necessary to raise and lower the basketball backboard.
		The counter-weight 36 is of such weight as to provide a force tending to rotate the lower link 28 counter-clockwise to counter the weight of the backboard 23 tending to rotate the lower link 28 clockwise in the drawing.
		Ideally, the forces about pivot 30 due to the counter-weight link 36 and basketball backboard 23 should be close to equal but such is not mandatory.
	www.freepatentsonline.com /5720679.html (3128 words)

	Blue Mountain Community College (Site not responding. Last check: 2007-10-11)
		Performance will be satisfactory if force is analyzed and the analysis is consistent with course textbook and lecture materials.
		Performance will be satisfactory if force systems are recognized and the recognizable is consistent with course textbook and lecture materials.
		Performance will be satisfactory if force moments are defined and calculated in a manner consistent with course textbook and lecture materials.
	www.bmcc.cc.or.us /catalog/temp_cat/C10000455.html (945 words)

	Building Wooden Planing Forms
		The short sides of the parallelogram are made from steel strap with ¼ inch holes on about 1 1/8” centers.
		Cut two pieces from the left over scrap from the long side of the parallelogram to a length equal to the height of the box.
		Using the parallelogram as a guide with the long sides touching, position and glue the second end piece.
	www.bambooflyrod.net /woodforms.htm (2603 words)

	Experimental test of Newton' (Site not responding. Last check: 2007-10-11)
		Hence we must draw the conclusion that the force not only moves the stone towards Earth, but it also moves Earth towards the stone, although the acceleration, corresponding to Newton's second law of motion due to the enormous size of the mass of Earth must be so small, that is cannot be detected.
		in the opposite direction and indeed with a force, which is equally large and opposite to that by which the magnet attracts it.
		AB of the parallelogram, the form of which is determined by the directions of AX and AY, that is, by the angle between them.
	kr.cs.ait.ac.th /~radok/physics/a5.htm (3433 words)

	Question & Answer with Paul Hewitt
		When we speak of a force, we mean a push or pull that acts on a particular object.
		If you push on an object and it doesn't move, then there must be a force (such as friction) that is equal to your push but coming from the opposite direction.
		If the forces are in opposite directions, you subtract one force from the other to find the net force.
	www.phschool.com /science/cpsurf/ques_hewitt/QA03.html (242 words)

	Sheldon Brown's Bicycle Glossary P-Q (Site not responding. Last check: 2007-10-11)
		A parallelogram is a four sided geometric form, in which opposite sides are of equal length.
		A parallelogram linkage with pivots at the four corners will allow the angles to change as it flexes, but the facing sides always remain parallel to one another.
		This is a very useful mechanism for derailers, because it allows the derailer cage to move sideways while remaining parallel to the chain, and without the friction that would result from a sliding motion, as used on older plunger-type**** derailers.
	www.sheldonbrown.com /gloss_p-q.html (4036 words)

	CSHPS/SCHPS
		Helmholtz applies these Kantian principles to prove that the intensity of forces must be a function of position, and that since position is definable only in relative space, force functions must be definable with regard only to the relative positions of the mass-points comprising a physical system.
		Kant erroneously believes that, because the “pure empirical construction” of the concept of force in intuition requires the supposition of at least two mass-points, he can show that Newton’s law of force addition is apodictically necessary.
		Surprisingly, conservative motivations can lead to innovative developments (e.g., non-Euclidean geometries were invented in the attempt to clarify the logical structure of Euclidean geometry) and innovative aims can result in a deeper understanding of a given theory (e.g., the consideration of infinite groups led to a refinement of the theory of finite groups).
	www.yorku.ca /cshps1/program04-Abstracts.htm (8610 words)

	Area of Parallelogram
		The area of a parallelogram equals the product of one of its sides times the distance between that side and its parallel (and equal) mate.
		Triangles ABD and ACD are reflections of each other in the center - the point of intersections of the diagonals - of the parallelogram.
		The area of each then is half that of the parallelogram.
	www.cut-the-knot.com /Curriculum/Geometry/AreaOfParallelogram.shtml (427 words)

	Wood Planing Forms
		You may want to mount a handle like a block plane or a ½”dowel projecting to either side or simply round and sand the trailing edge of the plane.
		Now, with a 1/4-20 thumb bolt you can force the parallelogram apart.
		The short sides of the parallelogram are made from steel strap with 1/4 inch holes on about 1 1/8” centers.
	www.bamboorodmaking.com /html/wood_planing_forms.html (2548 words)

	evert rotor tech
		Vectorial addition of forces, by circle-arcs or bended curves can´t be shown well.
		Centrifugal force and pulling force will compensate to null, so no force-triangle or force-parallelogram will be, amount of inertia, speed and kinetic energy are unchanged.
		Opposite, if mass is moved at spiral tracks, amount and direction of forces are differing, thus all times an effective resulting power component will be produced, in-avoidable.
	www.evert.de /eft343e.htm (4035 words)

	Grasping- Force Sensor for Robot Hand (Site not responding. Last check: 2007-10-11)
		However, the design of the grasping-force sensor is integrated with that of the grasping mechanism in such a way that the deflection caused by the grasping force does not disturb the angular alignment of the claws.
		The hollow rectangular cross sections of the base frames make the frames act similarly to parallelogram linkages when they are subjected to the grasping force directed along their vertical (as shown in the figure) sides.
		These gauges are connected in a full-bridge configuration that measures the deflection along the axis of motion of the claws toward or away from each other (the vertical axis in the figure).
	ranier.hq.nasa.gov /telerobotics_page/Technologies/0203.html (420 words)

	[No title]
		The change of motion is proportional to the motive force impressed and made in the direction of the right line in which that force is impressed (law of momentum).
		Newton is also credited with the first correct general statement of the parallelogram of force, based on his observation that a moving body affected by two independent forces acting simultaneously moved along a diagonal equal to the vector sum of the forces acting independently.
		The diagonal, which is equal to the vector sum of the horizontal and vertical forces, is, therefore, 45 degrees, and the missile should traverse the greatest distance when it travels at this angle.
	tuberose.com /Kinesiology.html (10434 words)

	Syllabus - National Defence Academy - Competitive Exams - Education in India
		Areas of squares, rectangles, parallelograms, triangle and circles.
		Properties of angles, sides and diagonals of a parallelogram, rectangle and square
		Forces shaping the modern world: Renaissance, Exploration and Discovery.
	www.webindia123.com /career/compexam/nda/sylla.htm (595 words)

	Untitled Document
		Conditions of equilibrium of concurrent co‑planar forces, methods of projection.
		Funicular, polygon, graphical method of determining the resultant of a given system of forces.
		Method of moments, theorem of varignon resultant of a system of parallel forces, conditions of equilibrium.
	www.cept.ac.in /sbststr2.htm (169 words)

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