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Originally Posted by Happy Monkey
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.
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Maybe I need to post that in the ignorance thread.