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Why a normal machine could not have the mechanical efficiency of 100?
Wiki User
∙ 14y ago
Because there is always going to be friction, the efficiency of any machine will always be less then 100 percent.
Wiki User
∙ 14y ago
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How do you calculate the ideal mechanical advantage of a lever?
It's 1. IMA = Distance in / Distance out. A single pulley doesn't do anything toward mechanical advantage, it changes the direction of the force. Not always. A single-axeled pulley (the typical pulley) has an IMA of 1, having one axel. If there was a second axel, then the IMA would = 2, so on and so forth. The easy way to do it is IMA = # of axels.
Can the actual mechanical advantage of a machine ever be greater then its ideal mechanical advantage?
In real machines, there is always friction that reduces the efficiency of the machine.This reduces the mechanical advantage because some of the input force has to be used to overcome the force of friction in the machine.To reduce friction in the machine, you could add a lubricant such as oil.
What is the difference between machine and motor?
Really there is no difference, if you wanted to be technical, you could say that a machine is a car, hand drill, garbage disposal, etc. . While a machine tool is a piece of equipment that makes parts or tooling, like a milling machine or lathe.
Does MA stand for Mechanical Advantage?
It could, or Master of Arts.
What is electrical degree?
An 'electrical degree' is 1/360th of one complete cycle of AC. This does not necessarily coincide with a 'mechanical degree', as it depends upon the design of the generator that produces the AC voltage. For a two-pole machine, the armature (rotating winding) must rotate 360 mechanical degrees in order to generate one complete cycle or 360 electrical degrees. A four-pole machine's armature, on the other hand, need only rotate through 180 mechanical degrees to generate one complete cycle or 360 electrical degrees.On the other hand, you could be asking about a bachelor's degree in electrical engineering?!
What is the difference between actual machanical advantage and ideal machanical advantage?
Ideal mechanical advantage is what could be obtained without the effects of gravity and friction lowering the efficiency of the machine. The actual mechanical advantage is what can actually be obtained by the machine.
What use did the mechanical reaper do?
It could reap (harvest) cotton with the efficiency of five men.
What is an adding machine?
An adding machine is a mechanical or electromechanical calculator which could perform addition and subtraction.
What is the opposite of mechanical?
The opposite of mechanical (by machine) could be biological or natural.The opposite of mechanical (perfunctory, without thought) could be conscious, considered, or thoughtful.Where mechanical has the connotation automatic, the opposite would be manual.
Can any pulley have a efficiency over 100?
No. A perfectly frictionless machine could have an efficiency of 100%. Anything less perfect must have can efficiency less than 100%.
Is it true a simple machine is one that always gives a mechanical advantage of 2?
No. A simple machine such as a lever could quite easily give a mechanical advantage of 10, 100 or more, or could even be less than 1.
What happens to the mechanical advantage of a machine if friction is reduced through the use of oil or some other means?
Wear and tear of moving parts would be reduced. Less energy would be needed to run the machine, as there would be less friction to be overcome. A well lubricated machine is more efficient than a neglected machine with unoiled parts.
How do you calculate the efficiency of an electrical mechanical system?
You could have an electric motor driving a reduction gearbox, for example. The efficiencies of both might be considered individually, or as a whole. As a whole is easier. (Work out/ work in) x 100 = efficiency%. Or, (power out/ power in) x 100 = efficiency%. Or, (force out/ force in) x100 = efficiency%. It depends on what you have to work with, what you use. If you did need to calculate electrical and mechanical efficiencies separately because of different units, the final overall efficiency will be (total of the percentages) / (number of percentages).
Does a bigger wheel increases the efficiency of the machine in the wheel and axle?
Generally automobiles are designed with optimum size wheels. Changing the diameter is unlikely to increase efficiency, and could well have the opposite effect.
What is a quantity expressed as a percentage that measures the ratio of work output to work input?
The comparison of a machines work output with its work input represented as a ratio is called the efficiency of the machine. In the real world this ratio can never be 1. The reason is that whatever work is input to the machine cannot be converted entirely to output. There are losses due to friction, heat generation and dissipation, air resistance etc. If we could have a machine with an efficiency of 1, we can have perpetual motion. That means that you drive a car up to say 65 mph on the highway and then turn off the engine, you will be going on the highway forever without spending another dime for gas. Turbines in power plants would just have to be started and brought to operating speed and from then on they will run forever.
Who invented The first Mechanical Counting Device?
The first mechanical counting device was invented by Blaise Pascal in 1642. It was primarily used as an adding machine. It could add and subtract two numbers.
What was the purpose for the computers in the early days?
The purpose of the machine was to create a mechanical brain that could create interest for others to make more creations of its kind.
