Two children want to balance horizontally on a seesaw. The first child is sitting one meter to the left of the pivot point located at the center of mass of the seesaw. The second child has one-half the mass of the first child. Where should the second child sit to balance the seesaw?
a. 1m to the right of the pivot
b. 0.5m to the right of the pivot
c. 4m to the right of the pivot
d. 2m to the right of the pivot
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