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Originally Posted by glatt
Laws of physics determine how fast you can swing a hammer. Doesn't matter how strong or fast you are, two people with the same length arm will swing a hammer of identical weight at the same speed. That's how pendulums on clocks are able to be used to tell time.
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I think you need to brush up on your physics. Pendulums work because the only force on them is gravity. If you motorized them, they'd go faster, and a stronger motor would move them faster. Likewise, a stronger person can swing a hammer faster and harder.
I haven't seen that documentary, so I can't speak to that specific instance, though.