A History of MechanicsDover Publications, 1988 - 662 стор. A remarkable work which will remain a document of the first rank for the historian of mechanics. -- Louis de Broglie |
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... lever with two unequal arms which carry unequal weights at their ends . Indeed , when the lever rotates the velocities of the weights will be proportional to the lengths of their supporting arms , for in these circumstances the powers ...
... lever , the resistance is always a weight hung from the lever , and the power is constantly perpendicular to the arm of the lever . Guido Ubaldo had made use of this practical observa- tion and Descartes followed him . We shall return ...
... lever . " He considers a lever which is free to turn about a point A and whose different arms carry weights or powers which act perpendicularly to the arms . If the powers are divided into two groups that act on the lever in opposite ...
Зміст
CHAPTER ONE HELLENIC SCIENCE | 19 |
ALEXANDRIAN SOURCES AND ARABIC MANUSCRIPTS | 32 |
THE XIIIth CENTURY THE SCHOOL OF JORDANUS | 38 |
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