unstable equilibrium


Also found in: Dictionary, Medical, Wikipedia.
Related to unstable equilibrium: neutral equilibrium

unstable equilibrium

[¦ən′stā·bəl ē·kwə′lib·rē·əm]
(physics)
An equilibrium state of a system in which any departure of the system from equilibrium gives rise to forces or tendencies moving the system further away from equilibrium; for example, mechanical equilibrium in which the potential energy is a maximum, as a sphere sitting on top of a hill.

unstable equilibrium

The condition of a structure in a state of equilibrium; when a slight disturbance is applied to the structure and then removed, the structure does not return to its original equilibrium position. Compare with stable equilibrium.
References in periodicals archive ?
In general, we say that a neutrosophic system is in (t,i,f)--equilibrium, or t% in stable equilibrium, i% in neutral equilibrium, and f% in unstable equilibrium (non-equilibrium).
The first equilibrium, as shown in the graph below, is an unstable equilibrium.
This is a rather unstable equilibrium, where small changes in [[lambda].
Usually, the computed free energy of the system has a local maximum (corresponding to an unstable equilibrium state) associated with a small radius of the particle of the new phase.
The effect of negative synergy is seen to be most significant under conditions where a potent external element may exacerbate unstable equilibrium conditions, especially those unstable in nature.
For x = 0, we have an unstable equilibrium point and two new symmetrical stable equilibrium points.
A broomstick balanced upside down, for example, is in an unstable equilibrium position.
In this context, energy destabilizes the unstable equilibrium of the complex -vascular, tri-neuronal, and cortical-macular system.
KRUPP is in unstable equilibrium at the Griffith Observatory Satellite during construction at Griffith Observatory in Los Angeles.
In theory, it means that the oscillator is in an unstable equilibrium.
For an unstable equilibrium, within even a tiny neighborhood N of the point, some ([x.