School yard teeter-totter with certain length


A school yard teeter-totter with a total length of 5.5 and a mass of 36 is pivoted at its center. A 19 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?

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Physics: School yard teeter-totter with certain length
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