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Losses of energy within the machine- some of the energy is used up by friction, and converted to heat. There is also the matter of efficency of a machine. The less efficent, the more power you must put in to get the same output.
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∙ 13y ago
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What is meant by the input force and output force of a machine?
the input force is how much energy or force you put into the machine, the output force is how much energy the machine produces with the end product.
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.
What does efficiency tell you about a machine?
The efficiency of a machine tells you how much usefull energy it will put out compared to the amount of energy that's put in. The usefull output energy is usually less (never greater) then the input because of energy loss due to frictional heating. For example if 120 joules of energy or work is put into a lifting machine, you might only get out 110 joules of lifting work because 10 joules is lost to heat. The efficiency of the machine is then ; (110/120) x 100% = 91.7% . I think for most practical machines anything above 90% efficient is quite good. (The terms work & energy are used interchangebly here because work is a transfer of energy).
Why cant a machine be 100 percent efficent?
The question is a little vague, but if I understand correctly, you're asking why a machine doesn't release as much energy as you put in to it. The reason for this is that energy is very unpredictable. For instance, if you add 1000 W into an electric kettle, not all the energy will go into heating the water. Some of the energy gets lost in the wires, some of the released heat might go into the air, some of the water might boil, etc. The same thing applies for all other machines.
Can you get more energy out of machine than that is put in?
No, that would be a violation of the laws of physics.
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
What is meant by the input force and output force of a machine?
the input force is how much energy or force you put into the machine, the output force is how much energy the machine produces with the end product.
Downside of solar energy?
solar energy sucks u cant put a flowmaster on solar energy sucks u cant put a flowmaster on
What is the term that relates to how much of the energy you put into a machine actually goes where you wan it to go?
That's its efficiency.
In what way is a machine subject to the law of energy conservation?
The law of conservation of energy was never found to be violated. The relevance for a machine is that a machine can not produce more energy than is put into the machine.
Why is the amount of that a machine does is less than the amount put into the machine?
In such a machine, the remaining energy is wasted to friction
What is an efficiency ratio?
The efficiency ratio for a machine usually refers to the ratio of the useful energy available from a machine and the energy put into 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.
How much work put into a machine is changed to useful work put out by the machine?
90%
What does efficiency tell you about a machine?
The efficiency of a machine tells you how much usefull energy it will put out compared to the amount of energy that's put in. The usefull output energy is usually less (never greater) then the input because of energy loss due to frictional heating. For example if 120 joules of energy or work is put into a lifting machine, you might only get out 110 joules of lifting work because 10 joules is lost to heat. The efficiency of the machine is then ; (110/120) x 100% = 91.7% . I think for most practical machines anything above 90% efficient is quite good. (The terms work & energy are used interchangebly here because work is a transfer of energy).
Why cant a machine be 100 percent efficent?
The question is a little vague, but if I understand correctly, you're asking why a machine doesn't release as much energy as you put in to it. The reason for this is that energy is very unpredictable. For instance, if you add 1000 W into an electric kettle, not all the energy will go into heating the water. Some of the energy gets lost in the wires, some of the released heat might go into the air, some of the water might boil, etc. The same thing applies for all other machines.
Can you get more energy out of machine than that is put in?
No, that would be a violation of the laws of physics.
