33. The problem intends for the children to be completely above water. The total downward pull of gravity on the system is ()wood3 356 NNgVρ+whereNis the (minimum) number of logs needed to keep them afloat and Vis the volume of each log: V= π(0.15 m)2(1.80 m) = 0.13 m3. The buoyant force is Fb= watergVsubmergedwhere we require
This is the end of the preview. Sign up
access the rest of the document.