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Is it possible to get more work out of a machine that you put in?
Wiki User
∙ 14y ago
Yes and no. The energy in the universe is constant so you can not get more work out of a system than exists in the system.
For example, if there is 20 kJ (kilojoules) of energy that exists in the system in the form of heat, chemical energy, etc... and you put in 5 kJ of energy, it would be possible to get out 10 kJ of energy. It is not possible however to get 30 kJ of energy out of the system because 30 kJ does not exist in the system, and energy can't be created, only transfered.
Wiki User
∙ 14y ago
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Why is output work sometimes greater than input work?
It CAN'T be greater, unless some energy reserve within the machine gets used up. Other than that, getting more work out of a machine than is put in it would violate conservation of energy, and according to our current understanding of physics, that simply isn't possible.
How can you increase the work output of a machine?
the only way to increase the work output is to increase the amount of work you put into the machine.
If machines make work easier explain Why most machines actually increase the amount of work you do in accomplishing a task?
No machine is 100% efficient. The amount of work you get out of the machine is always something less than the amount of work you put into it. So you have to put in more work than the job actually requires. It's the price you pay for making the job 'easier' by using the machine to do it.
Can a simple machine put out more energy than is put into it?
NO. No system can put out more Energy than is put into it. That would violate the 2nd Law of Thermodynamics. However, a simple machine, like a lever can put out more Force than is put in.
Why is the work needed to operate a machine always more than the work done by the machine?
there is more work needed to operate a machine then the work the machine does its self is because the machine has to be told how to do things the right way. therefore people need to tell it how to do the correct thing. the more work the people do, the more work the machine does, so you could say its almost equal. ======================================== Very nice but, unfortunately, unclear on the concept. Instead of "work", let's say "energy". They're the same thing, but it might help me get the point across better. A machine can't 'make' energy. All the machine can do is take the energy you put into it, and change it to a more convenient form in order to do what you need done. But it turns out that you must always put more energy into the machine than the useful energy that comes out of it. That's because some of the energy is always lost in the process of operating the machine ... on account of friction, air resistance, unintended heating ... things like that. We do everything we can to make the loss as small as possible, so that we don't lose too much of the energy that we paid for. We do things like using grease, oil, and roller bearings to reduce friction between machine parts, using thicker wire in an electrical circuit to reduce its resistance, and streamlining cars and airplanes to reduce air resistance. We've learned to reduce the losses quite well, but we can never completely eliminate them.
What is the ratio of work put out of a machine to the work put in is its?
It is the efficiency of the machine.
How much work put into a machine is changed to useful work put out by the machine?
90%
Is a measure of how much work put into a machine is changed to into useful work by the machine?
Efficiency
The comparison between output work imput work is?
Work input is how much work you put into a machine and work output is the work done by the machine according to how much work you put into it. You will never get more work out of a machine than you put into it. The efficiency of a machine is how much useful work you got out of the machine compared to how much you put in (expressed in a percent). Efficiency = Useful Work Output ÷ Work Input
Why is output work sometimes greater than input work?
It CAN'T be greater, unless some energy reserve within the machine gets used up. Other than that, getting more work out of a machine than is put in it would violate conservation of energy, and according to our current understanding of physics, that simply isn't possible.
Is it possible that you could build a time machine?
Well anything is possible if you put your head to it!
How can you increase the work output of a machine?
the only way to increase the work output is to increase the amount of work you put into the machine.
If machines make work easier explain Why most machines actually increase the amount of work you do in accomplishing a task?
No machine is 100% efficient. The amount of work you get out of the machine is always something less than the amount of work you put into it. So you have to put in more work than the job actually requires. It's the price you pay for making the job 'easier' by using the machine to do it.
Is it possible to invent a machine that would turn inorganic material into food?
In theory, if you could put the proper nutrients into it, it would be possible to invent that machine.
Can a simple machine put out more energy than is put into it?
NO. No system can put out more Energy than is put into it. That would violate the 2nd Law of Thermodynamics. However, a simple machine, like a lever can put out more Force than is put in.
Is it possible to put fresh blueberreies instead of dried in breads?
Is it possible to put fresh blueberries instead of dries blueberries in breadin bread machine
What force insurces more work will always be put into a machine than it comes out?
No force. But you might be looking for either friction or entropy.
