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A man with a mass of 80 kg sits on a large seesaw 9 m from the center. Two children each with a mas of 30 kg are seated on the other side of the...

A man with a mass of 80 kg sits on a large seesaw 9 m from the center. Two children each with a mas of 30 kg are seated on the other side of the seesaw. One child seats 5 m from the center. How far from the center should the other child seat to balance the seesaw? 

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let second child seat at a distance  r  from the center. let assume center of mass is at origin  X ​ ( ​ ​ c... View the full answer

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