Any help is greatly appreciated.

A lawnmower engine running for 20 min does 4,560,000 J of work. What is the power output of the engine? (Power: P = W/t)

3800 W
228,000 W
91,200,000 W
547,200,000 W

Question

Any help is greatly appreciated.

A lawnmower engine running for 20 min does 4,560,000 J of work. What is the power output of the engine? (Power: P = W/t)

3800 W
228,000 W
91,200,000 W
547,200,000 W

michele_laino · Answer

pease you have to divide work by time, so:
$$P=\frac{ W }{ t }=\frac{ 4,560,000 }{ 20*60 }=3,600 Watts$$
because we have to measure time in sec, and 20 mins=20*60=1,200 sec

michele_laino · Answer

oops sorry
=38,000 watts

michele_laino · Answer

sorry: P=3,800 Watts

anonymous · Answer

Hey thanks a lot i forgot that i had to use seonds!

michele_laino · Answer

I've made some typing errors

michele_laino · Answer

$$watts=\frac{ joules }{ seconds }$$

anonymous · Answer

Your good, i saw the answer so thank you :)

michele_laino · Answer

thank you!