A gust of wind does 125J of work on the blades of a windmill. Because of this the windmill can do 46.9J of useful work output. How efficient is the windmill?

The efficiency of the windmill is 37.52 %.

Explanation:

Given that,

A gust of wind does 125 J of work on the blades of a windmill,

The windmill can do 46.9 J of useful work output,

We need to find the efficiency of the windmill. It is given by the ratio of output work to the input work. So,

So, the efficiency of the windmill is 37.52 %.

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explanation:

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