is one of stableequilibrium. In the position of rest the ball is held inequilibrium by two forces, the downward weight of theball and the upward pressure of the pin, and these forcesare in the same vertical line; after the lateral deflectionthe two forces form a couple (Art. 10) which tends… … 64 j Center of Gravity Chap, hi jince the entire weight of a body concentrated at itscenter of gravity produces the same tendency to rotationas the actual distributed weight (Art. 13), the conditionsof stable equilibrium are, first, that the center of gravityof the body shall lie in the same…
Mechanics
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