cebollablogscd

2022-12-30

A lawnmower engine running for 20 min does 4,560,000 J of work. What is the power output of the engine?

Expert

Energy per unit of time, commonly measured in joules per second, determines power (equivalent to watts). You might consider it to be the speed at which work is completed.
$P=\frac{W}{t}$
We are given $W=4560000J$ and $t=20min=1200s$.
$⇒P=\frac{4560000J}{1200s}$
$=3800W$
Thus, the power output of the engine is 3800 watts.

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