Labels:text | screenshot | font OCR: Leonardo here works with the principles of impetus and percussion. This page begins with a version of the axiom that water flows downhill. A passage accompanying the drawing of the seesaw A discusses the effect of two men balanced on it. When one attempts to jump, they find that it requires cooperation-a stoop and jump by the first man must be coordinated with a push by the second. This study of changing equilibrium and balance introduces a more difficult problem: How does water act when it falls (as in a waterfall)-the
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