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.
Work output divided by energy input = efficiency
You divide the useful output power by the input power.
(Work out / work in) * 100 = % efficiency
Efficiency = useful output power / input power
You use the definition of "efficiency": you divide output power by input power. Both of these, of course, need to be measured or calculated.
The mechanical advantage of a compound machine is the multiple of the separate mechanical advantages of each simple machine. The efficiency of the compound machine is also the multiple of the separate efficiencies of each simple machine. So the work in to the first machine multiplied by all of the simple machine efficiencies gives you the work out of the last machine
a compound machine is a machine that is compound and an EXAMPLE OF A COMPOUND MACHINE IS THAT IT IS LIKE A CAR BECAUSE A CAR IS COMPOUND! GOT IT GET IT GOOD!
is a toaster a compound machine?
Efficiency = useful output power / input power
Efficiency = useful output power / input power
efficiency is a product of the input versus the output
The decimal efficiency of each part multiplied together.
The efficiency is output divided by input.
You use the definition of "efficiency": you divide output power by input power. Both of these, of course, need to be measured or calculated.
Efficiency is nothing but calculating how the machine is performing for what it has been made for, Efficiency is usually calculated in % as (output/input )X100. for Eg. the Thermal efficiency of an reciprocating gasoline engine can be calculated as follows, Let, the input for an reciprocating engine is 12MJ and its out put is 4MJ then Efficiency is (4/12)X100 = 33%
The mechanical advantage of a compound machine is the multiple of the separate mechanical advantages of each simple machine. The efficiency of the compound machine is also the multiple of the separate efficiencies of each simple machine. So the work in to the first machine multiplied by all of the simple machine efficiencies gives you the work out of the last machine
It is lower because compound machines have more moving parts that a simple machine does.
MA = Revolutions of input shaft / Revolutions of output shaft. (Input torque * MA) * efficiency = Output torque Note 100% efficiency = 1.0
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).
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.