A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 204
ora loaded circle (Fig. 112). In the last two cases it is tobe noticed that the centre of gravity is above the pointof support, and still the equilibrium is stable. Unstable equilibrium is illustrated by Fig. 107, since,as seen in Fig. 110, a displacement is accompanied by atendency to rotate… … Fig. 112, the loaded circle in the position shown in Fig. 114. Neutral equilibrium is shown by Fig. 108, where thecentre of gravity and point of support coincide. It isalso illustrated by the case of a cone resting on its side,or of a sphere in any position on a horizontal surface;also by a wheel…
Mechanics
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