ch14-p033 - 33. The problem intends for the children to be...

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33. The problem intends for the children to be completely above water. The total downward pull of gravity on the system is () wood 3 356 N Ng V ρ + where N is the (minimum) number of logs needed to keep them afloat and V is the volume of each log: V = π (0.15 m) 2 (1.80 m) = 0.13 m 3 . The buoyant force is F b = water gV submerged where we require
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