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As there are many types of losses in a machine & these losses reduces the efficiency of that machine, hence ideal machine can never be there.
For an ideal machine, its efficiency should be 100% i.e.
Output of the machine= Input of the machine.
But in practice, due to various losses & temperature effects, our output is always less than the input.
For non ideal machine, input= output + losses.
A machine cannot be perfectly efficient (able to convert 100% of input work into output work), since a machine experiences forces that draws energy away from the system, the most evident being friction. Frictional forces converts energy into heat which escapes to the surrounding and cannot be captured to do work; thus, it is considered "lost" energy. Though the energy is not lost, it is converted into unusable forms, which adds to the entropy of the universe (by the 2nd law of Thermodynamics, which states that entropy of the universe always increases). Therefore, the machine cannot output all of the energy that was inputted to do work, it will always lose some energy to the surrounding.
No machine is 100 percent efficient because energy is always lost due to heat or friction.
A machine cannot be 100 percent efficient because of energy lost to friction. Friction affects large scale machine and also exists at the electron level.
because it will be just like fossil fuels the energy will be used up to quick, (this is obvious, only this part is by ife)
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they reduse the friction between the machine parts.
Efficiency Efficiency
An ideal machine can reach 100% efficiency as there is no friction or other restraints involved, whereas a real machine can never reach 100% efficiency.
The efficiency of a machine is found by dividing the amount of work done by a machine by the amount of energy used by a machine. The answer is then multiplied by 100 to give a percentage.
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they reduse the friction between the machine parts.
Mechanical Efficiency is the ratio of Actual mechanical advantage to ideal mechanical advantage.Efficiency will be maximum when Actual mechanical advantage equals that of ideal.But practically not possible.Actual mechanical advantage will be less due to friction,heat,deflection etc.avoiding these loses will increase the machine efficiency.
A high efficiency machine will produce more of what is it that you want with the same power as the low efficiency one. In other words, for a low efficiency machine do as much as a high efficiency one, you have to give it more power (energy).
Reduce losses from friction so forth in transmission of power. Ensure fuel utilized to the fullest.
The efficiency of a machine is usually expressed as a percentage. The ideal efficiency of a machine is 100-percent.Another AnswerThere are no units of measurement for efficiency, because you are comparing like with like: output power divided by input power.
Generally automobiles are designed with optimum size wheels. Changing the diameter is unlikely to increase efficiency, and could well have the opposite effect.
Efficiency Efficiency
A high efficiency machine will produce more of what is it that you want with the same power as the low efficiency one. In other words, for a low efficiency machine do as much as a high efficiency one, you have to give it more power (energy).
Is the system of using machine to perform works instead of using human power.
The efficiency is 80%. To find the efficiency, 400/500 = 80%.
a machine applies a force of 100 newtons over a distance of 10 meters to raise a500 newtons drum 1.5 meters. what is efficiency of the machine ?