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who the second law of motion

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Paulagenea05viz
do you mean what? not who. or are you asking who discovered the law of motion. I don't really get it but....
 if you're asking who discovered it. It was newton.
 but if you're asking what i the second law of motion. then it is " acceleration " 
Anniecaviz
the newton's second law of motion is the "law of acceleration"