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  • Re: Generator, no. Alternator, close. It's a MAGNETO!

    by » 5 months ago


    Tyler Hathaway wrote:

    By that definition, a hovering helicopter is doing zero "work", but it sure requires a lot of "power".  ;)

    The analysis depends on how one draws "the box" of consideration. Work is being done on the air, accelerating molecules down to get a force up balancing gravity's force on the helicopter. But no work is being done on the helicopter!

    Newton's laws of force and inertia are very simple, but also very non-intuitive. That's why it took ~10,000 years to figure them out.

     


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