Axes of Motion and Stability/Answer 2

Positive Static Stability.

Positive static stability is the initial tendency to return to an undisturbed state after a disturbance. This concept is easily illustrated by the ball and cup analogy. Placing a ball in the bottom of a cup which is the right way up and then moving it from the base up one side and letting go will, after some oscillation, result in the ball ending up stationary back on the base. This is positive static stability.

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