Which static stability describes the initial tendency to continue away from the original equilibrium after disturbance?

Which static stability describes the initial tendency to continue away from the original equilibrium after disturbance?

• A. Negative static stability
• B. Positive static stability
• C. Neutral static stability
• D. Dynamic stability

Answer: (A)

Static stability looks at how a system behaves right after a disturbance. If a small displacement causes a restoring effect that pushes the system back toward its original state, that’s positive static stability. If the disturbance makes the system move further away from the equilibrium, the initial tendency is to continue in that direction, which means negative static stability (the system is unstable). If the displacement neither pushes back nor continues away, it’s neutral static stability. Dynamic stability, on the other hand, describes how the motion evolves over time, including damping, after the disturbance. Here, the initial tendency to continue away from the original equilibrium means negative static stability, indicating instability.

Static stability looks at how a system behaves right after a disturbance. If a small displacement causes a restoring effect that pushes the system back toward its original state, that’s positive static stability. If the disturbance makes the system move further away from the equilibrium, the initial tendency is to continue in that direction, which means negative static stability (the system is unstable). If the displacement neither pushes back nor continues away, it’s neutral static stability. Dynamic stability, on the other hand, describes how the motion evolves over time, including damping, after the disturbance.

Here, the initial tendency to continue away from the original equilibrium means negative static stability, indicating instability.