A school yard teeter-totter with a total length of 5.0 and a mass of 36 is pivoted at its center. A 16 child sits on one end of the teeter-totter.

A school yard teeter-totter with a total length of 5.0 and a mass of 36 is pivoted at its center. A 16 child sits on one end of the teeter-totter.Where should a parent push vertically downward with a force of 250 in order to hold the teeter-totter level? Where should the parent push with a force of 310N?

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