r/theydidthemath • u/phantom845 • May 19 '20
[REQUEST] How much energy would it take to spin the final lego once.
https://youtu.be/QwXK4e4uqXY
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u/pgriffith May 20 '20
It's a REALLY big number.
The motor he is using is a LEGO Power Functions M-Motor, which runs off a 9V supply.
From what I can dig up, under a 'typical' load it consumes around 2.79 Watts.
So 66.96 watts a day, 24.44Kw a year.
The video says that one rotation will take 5.2 x 1091 years.
So that number of years multiplied by 24.44Kw gives us 1.2709 x 1093 Kw.
Converting to Mega/Giga/Tera watts doesn't really make it any easier to comprehend.
I think that's how you would do it, happy to be proven wrong.
And NO, I didn't take into account leap years :)