Question

If a machine requires an output of 5,000 joules of work to put out 4,000joules of work, what is the machines efficieny? (Hint: the formula for efficiency is below):

Efficiency= Output work/
/Input work X 100%

Answers:
100%
40%
80%
60%

Answer 1

Answer:80%

Explanation:

Answer 2

The machines efficiency is 80% .

Explanation:

Formula

`Efficiency = (W_(out)* 100)/(W_(in))`

Where
`W_(out)` represented the output work .

`W_(in)` represented the input work .

As given

If a machine input of 5,000 joules of work to put out 4,000 joules of work .

Input work = 5000 joules

Output work = 4000 joules

Putting the values in the formula

`Efficiency = (4000* 100)/(5000)`

`Efficiency = (400000)/(5000)`

Efficiency = 80%

Therefore the machines efficiency is 80% .