The mechanical efficiency of this machine is 30 percent.
Work output divided by Work input Times 100
Assuming you meant mechanical, Energy output / Input x 100
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%
Efficiency = Output/Input.
if one answer is 6 and the other answer is 7, how do the output numbers from the input/output machines compare
Mechanical efficiency
Sounds like you are asking about "mechanical advantage"...
Efficiency of a machine or mechanical advantage
Output power divided by input power, for a machine, is called the machine's efficiency. It need not be mechanical energy.
Mechanical efficiency
Work output divided by Work input Times 100
MA = Revolutions of input shaft / Revolutions of output shaft. (Input torque * MA) * efficiency = Output torque Note 100% efficiency = 1.0
The answer is mechanical advantage, not efficiency!
Output work is always less than input work.
Efficiency is a measure of power losses. A machine with an efficiency of say 85% or 0.85, experiences 15% power losses from input to output (as heat through friction) This would be typical for say a car, comparing crankshaft power to power at the drive wheels. No machine will exceed 100% efficiency > Work done = force * distance Efficiency = work done at output / work done at input > Mechanical Advantage (leverage) is distance moved by input / distance moved by output. Output force = input force * Mechanical Advantage
Output(input), or O(i)
If a machine has 100 percent efficiency, the output work = the input work. That's actually basically what the efficiency of a machine is - output work / input work * 100.