alleryStart learning →A marble rests on a flat horizontal table. Moved to a new spot, it simply stays there. What kind of equilibrium is this?
ANeutral equilibrium
BStable equilibrium
CUnstable equilibrium
DDynamic equilibrium
Answer & Solution
Correct answer: A. Neutral equilibrium
1. The marble is in equilibrium at its first position, since it stays put.
2. After being moved it is equally in equilibrium at the new position.
3. Equilibrium that does not depend on displacement from the original position is neutral equilibrium.
4. Neither a restoring nor a runaway effect appears, so it is neither stable nor unstable.
_Source: OpenStax College Physics (CC BY 4.0), Ch 9 "Statics and Torque", section 9.3 Stability_
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