About applications of friction at industry.?
478632
http://www.bccresearch.com/advmat/GB212R.html
184327
Yes, centralized lubrication systems are quite common on mechanical punch presses as well as other large mechanical machinery.  Check the sources for manufacturers of such systems.  I'm almost certain that there's something made for your particular application.
362474
It's almost impossible to calculate that, for air friction there is a physical constant that is mentioned in mechanical physics. but for a table, there is still a massive amount of friction being applied from the table. so i don't think that it can be calculated since the air friction changes in regards to speed. it could probably be approximated in a lab thou.
396452
1. reduce the force at which the surfaces press together.\n2. allow one surface to slide on top of a film of air rather than the other surface(a la hovercrafts and air hockey)\n3. reduce the roughness of the surface by polishing or using lube.\n\n***I know... they're more than one way... lol***
1022160
I hope this will help. \nFor dynamics see reference 2
960318
Remember that there is friction acting on the car from the movement of the wheels over the road. Work must therefore be done to overcome this friction.
26736
look up stuff like static friction, and your coefficient of friction...
1186313
According to your question I am telling the way of increasing efficiency from manufacturing aspect only (not from considerations of hydraulic aspects).\n\nDo you remember Moody's Diagram and the Darcy-Weisbach Relation for flow through pipes in Fluid Mechanics? \n\nFrom Darcy-Weisbach equation frictional head loss is proportional to the friction factor 'f' (as the head develoved by the pump and discharge cannot be changed; also diameter nd length cannot be changed as it is considered in design part and not in the manufacturing section). So to decrease frictional head loss i.e. to increase efficiency, 'f' has to be reduced. Now, recall Moody's Diagram, for turbulent zone the friction factor depends on Relative Roughness.\n\nRelative Roughness = (Average Roughness Height)/(Diameter)\n\nDiameter is fixed from design considerations, so you have control over 'Ra'-value (Average Roughness Height) only. If the surface finish of the pipings are made better 'Ra'-value can be reduced. Thus efficiency will be increased.\n\n\n\nTo william l:\nThe diameter and length of tubings are fixed by the "Design Engineer" and not by the "Shop Floor Engineers". So a manufacturing section of a factory cannot increase or decrease the dimensions of the drawing at their will.
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Which one.\nThey range from statical scales to efficient, low friction machines.
968512
When a bolt is tightened, it stretches.\nThink of the thread as just two, long inclined planes in contact with each other. The tension in the bolt results in the two planes being pressed together, the harder you press, the greater the friction. As you undo the bolt, the tension is reduced, the pressure is reduced and so the friction is reduced.
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The important laws of friction also known as Coulomb's laws of friction are:\n\n1. The frictional force is directly proportional to the normal force between the surface at which it acts.\n(Force required for pulling a block, initially at rest, over a surface is double of that required for pulling another block, of mass twice as the former and initially at rest, over the same surface is double.)\n\n2. Frictional force always acts in a direction opposite to the direction of motion or tendency of motion.\n(If a body is moving relative to another body in contact, then the frictional force acts on both the bodies. It acts on each body in the direction opposite to that of its motion. As the two bodies are in relative motion so the direction of motion of the first with respect to the second and that of the second with respect to the first are always opposite. So the frictional force acts on the two bodies in opposite directions.)\n\n3. The frictional force on a surface is always perpendicular to the normal force. \n(A box can be held over a vertical wall by exerting a force in a direction perpendicular to the wall because the frictional force, perpendicular to normal force, acts in the vertically upward direction thus resisting the downward motion of the box.)\n\n4. Fluid friction is less than solid friction. \n(So liquid lubrication is done in bearings to minimize friction and hence to reduce wear.)\n\n5. In solid friction, rolling friction is less than sliding friction. \n(So it is dificult to pull a cycle with brakes on than without it as when the brakes are on the type of relative motion between the wheel and the road is of sliding type.)\n\n6. The magnitude of frictional force is independant of the area of contact between the surfaces in relative motion. \n(The force required to move two blocks, initially at rest, of different shapes and sizes but with same mass over a particular surface is same. But  for two blocks, initially at rest, with different masses but same area of contact with the surface on which they move the force required to move the one with greater mass is more.)\n\n7. Coefficient of solid friction is independent of temperature.\n(The force required to pull a block resting on a surface does not change with temperature.)\n\n8. Static friction is always greater than kinetic friction.\n(The force required to move a body, initially at rest, over a surface is more than that to keep the same body, initially in motion over the same surface, in moving condition.)
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without friction, the car will not move when the wheel is turning. without friction, the wheel will not stop when u step on the brake. even if it stops, the car will not stop. without friction, u can't hold anything in your hand. u cannot stand upright. your glasses will not stay on your face. u will slide off your chair. everything would slide around.\n\nwithout friction, less energy is loss as heat and noise. less energy would be needed to power an engine. tire would not wear out. thing in motion would move longer.\n\nu get the idea
574667
You need to specify the other surface when asking for the coefficient of friction.  For example, sneakers and gym floors.
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The formula is actually divided up into two cases:\nForce friction = Force Applied when Force Applied < mu Static x Force Normal (i.e. nothing'll move below this threshold)\nForce friction = mu dynamic x Force Normal otherwise.\n\nThere is no formula for the two mus; they are measured experimentally.
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to the road through wear caused by friction
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at the moment there are the horizontal component of weight and the friction that opposes it are in equilibrium. we must apply a force that with the already present weight compontns will equal the kinetic friction. \nmeaning that \n\nWx + Fp = Friction.\n\n500cos20 + Fp = 0.6*500sin20 =>\n\nfp =367.24N
315092
Water and impurities in the water cause friction.