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How many people pedaling bikes does it take to power a washing machine heating water?

About 20 people pedalingA washing machine heating water needs about 2,000 W, and a rider makes about 100 W.

It takes about 20 people pedaling.

How we worked it out

A washing machine heating water needs about 2,000 W, and a rider makes about 100 W. Each rider keeps up a steady 100 watts, like a brisk ride. Real life adds a little friction and waste, so treat the number as a solid ballpark rather than a lab result. The constants behind every experiment are on the science page.

Watch it happen

This was one of the five experiments in It Took #4. In the game you guess first, then the experiment plays out with your number: too few and it fails, too many and it overshoots.

Play It Took #4Play today’s experiments

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