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Stability

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-85

2025-11-05

294

When a equilibrium, (a) a vertical line from the center of gravity will either pass through the point of suspension, or fall within the base of support; and in order that a body may have great stability (b) the base must be large and (c) the center of gravity low. An ordinary pyramid fulfills these conditions. The center of gravity of a pyramid (Fig. 1, for example) is a point (C) on a line (GF) joining the vertex and the center of gravity of the base, and at a distance from the base equal to one fourth the length of the line (that is, CF = 1/4 GF).

Fig. 1

The stability of an automobile is increased by having the frame of the " underslung" type (Fig. 2), thus bringing the center of gravity near the ground.

FIG. 2.- Underslung Automobile Chassis