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in this case it starts moving.
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What do I do?
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A body accelerating without any force...
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I can say Newton is wrong
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or I can say maybe there's a new force between that body and this body,
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and that will turn out to be the electrical force.
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Electrical force occurs whenever you take something,
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you take a cat and you take a piece of amber or you rub it,
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you do various things,
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then you put them next to other things
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and they're attracted or repelled,
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and you discover you're charging things,