what is ideal mechanical advantage? actual mechanical advantage?
488005
IMA assumes 100% efficiency, that no energy is lost. IMA = Distance in / Distance out\nAMA = Force in / Force out. takes into account energy lost due to friction
1075431
Strength of material, velocity, distance; any of these ring a bell!
338847
Easy. Comparative Advantage. It's all about technology and manufacturing. America is not the manufacturing powerhouse it was before the World War II. It just does not have the capabilities to match the Japanese anymore. We have molded ourselves into a more services-based economy, which is good for America in general, but bad for automobile companies like GE.
258345
The efficiency of an ideal engine is (1- T2/T1) or (T1- T2)/T1 = (600 - 400) / 600 =0.333.\nBut in the problem it is given that it is 0.5 which is not possible.
27382
advantage:\n\nfriction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not “grip” the rails nor could power be transmitted by belts. \n\ndisadvantage:\n\nOn the other hand, in the moving parts of machines a minimum of friction is desired; an excess of friction produces heat, which in turn causes expansion, the locking of the moving parts, and a consequent breakdown of the machinery. Lubrication is important in minimizing friction as are also such devices as ball and roller bearings.
994120
The special case of mechanical equilibrium of a stationary object is static equilibrium. A paperweight on a desk would be in static equilibrium. A child sliding down a slide at constant speed would be in mechanical equilibrium, but not in static equilibrium.\n\nIn static equilibrium there is not only a status quo, but there is no motion at all. In dynamic equilibrium there is motion but the overall situation is unchanging.
871846
For an object to be in mechanical equlibrium, the forces acting on it must be zero per standard definition.\n\nHowever, there is a good, short discussion on this topic in Wikipedia, the free, online encyclopedia:\n\nhttp://en.wikipedia.org/wiki/Mechanical_equilibrium\n\nQuoting:\n"A standard definition of mechanical equilibrium is:\n    A system is in mechanical equilibrium when the sum of the forces, and torque, on each particle of the system is zero.\n\nA particle in mechanical equilibrium is neither undergoing linear nor rotational acceleration; however it could be translating or rotating at a constant velocity.\n\nHowever, this definition is of little use in continuum mechanics, for which the idea of a particle is foreign. In addition, this definition gives no information as to one of the most important and interesting aspects of equilibrium states – their stability.\n\nAn alternative definition of equilibrium that is more general and often more useful is\n    A system is in mechanical equilibrium if its position in configuration space is a point at which the gradient of the potential energy is zero. "\n\nHope this helps!
26771
Advantages compared to what apparatus?? Please be precise...
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.
991659
the key to the tip is the "movable block".  mechanical advantage refers to the relationship between how far (how hard) you pull the rope versus how much the load moves.  if you have a rope running through a fixed block and down to a load, you can change the direction of force (you pull down, the load goes up), but you have no mechanical advantage.  for every foot you pull the rope, the load goes up one foot.  \n\nif you have a fixed block and a movable block attached to a load and the rope runs through the fixed block (F) once, down to the movable block (M), through M and back up to F, you have two parts through M (one down and one up).  if you attach a load to M and pull, the load goes up 1/2 foot for each foot of rope you pull, so you have a 2:1 mechanical advantage.  remember, the rope running through F at the top isn't giving you any mechanical advantage, its just changing the direction of your pull from up to down.  if you stood above M and pulled up, you'd get the same 1/2 foot up for each foot you pulled and the same 2:1 mechanical advantage.  \n\nso yes, the tip seems to work.  try it on paper for some other blocks, for example, double blocks at F and M.  \n\ngood luck!
806769
Since mechanical advantage is the factor by which a mechanism multiplies the force put into it, a mech. ad. of 3 means that whatever force is put into it, the output force will be 3 times that. For your problem:\n\noutput force = 3 * input force = 3*5 = 15 N\n\nI'm sorry, but I don't have an answer for the second part of your question. You might want to submit it as a separate question though, it will probably get some answers that way.\n\nI hope this helps!
1147178
Advantage - you can explain everything in rational terms. Disadvantage - come on, you can't be that rational!
953976
I'm not sure what it is that is to be compared, but here are some things to consider:\n\nBelt drives are very flexible as to drive ratios, since it is easier to make a pulley to any diameter, while gears are available in only a fixed number of pitches and diameters.\n\nBelt drives are more limited in maximum torque, since they depend on the friction between belt and pulley, while gears transimit force directly.\n\nOne of the main advantages of belt drives is the flexibility allowed as to the distance between the driver and driven shafts.  The distance between gears is set by the pitch diameter and does not allow for much variance.  Belt drive shafts can be far apart and allow for more variation in separation.\n\nBelt drives are less expensive for large scale systems.  Large pulleys and long belts are cheaper than large gears.\n\nBelt drives are not practical for very small scale (less than 1-2inch) systems or for shafts that need to be very close together.
638895
Too many for me to try to list here, More Advantage then Disadvantage. Don't you think?
1077010
All I can think of...\nGravity (weight of bike + person), friction (of ground and all axles), pedal force (not constant because you are pushing on an arc), air resistance, inertia (this is why it gets easier to pedal once you get to constant speed), sprocket ratio, gyroscope effect (makes it easier to balance).
1115811
Can you be more specific in your question. e.g. what will your equipment do? Are you looking to calculate rotary speeds and forces when compared to static forces. E.g. dynamic forces means you can balance on a bike, or even walk. But static forces are more simple to calculate and are based on Force/Area = Stress.
1010677
Mechanical design is one of most important subject in Mechanical engineering.\nIt deals mainly with the shape, strength, physics & mechanism of any physical component that you come across.\nFor eg., consider a chair here,\n-Shape wise u would look for asthetics characters with a constraint that the chair to stand firm on ground.\n- Strength wise, u would select a maximum load of 150 kgs, ie it should withstand that weight. Suitable material should be selected.\n-Physics, in this eg. u can limit it to ergonomics.\n-Mechanism, u could select or invent a new mechanism to adjust height, leen back etc.