Where a loaded wheel and rings suffer the most strain
A wheel, a semicircle and rings deforming under weight
A spoked wheel rests with its weight on the line m n, and Leonardo asks where, from the middle downward, it endures the most strain, by how much, in what part, and why. Further figures of a semicircle labelled with points and of rings pose the related question of where a ring will buckle. Three more rings are drawn but left unannotated.
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A wheel resting on line m n: where is the strain greatest?
The wheel, labelled with points e, d, c, a and resting on line m n, bears its weight on that line. Leonardo asks in what place, from the middle downward, the wheel endures the most strain, how much, in what part, and for what cause.
Where will the ring buckle?
For a ring labelled b, a, c, Leonardo asks in what place the ring will buckle or bulge out of shape under load. The question extends the strain study from the wheel to a closed ring.
Semicircle marked with points
A semicircle is drawn and marked with the points c, d, b, e, a. It serves as one of the figures for the accompanying study of loaded curved bodies.