# 200 joule of energy is supplied to machine which is 40% efficient amount of energy lost is?

Aug 3, 2018

120 J

#### Explanation:

The energy supplied was 200 J. It was 40% efficient, meaning it wasted 60% of the supplied energy.

Energy lost was $200 J \cdot 0.6 = 120 J$

I hope this helps,
Steve