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A uniform 20 kg wooden plank is supported by a fulcrum at the midpoint. From the...

A uniform 20 kg wooden plank is supported by a fulcrum at the midpoint. From the fulcrum, a 30 kg boy is positioned at some distance who is balanced by an 80 kg man positioned 1.5 m from it. What is the approximate force exerted by the fulcrum?

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