Question

Ethan is using a machine to mix cement. The work input is 10 and the work output is 8. What is the efficiency of the

machine?

Answer 1

Efficiency or
`\eta` is calculated by formula:
where
`\eta\leq1` also efficiency has no unit.

Now put in the data and calculate the efficiency.

`\eta=(8)/(10)=\boxed{0.8}`

The efficiency of the machine is 0.8

If you want to get percentage just multiply by 100 and you get 80%

Hope this helps.

r3t40