An object can move through an equilibrium position due to momentum, no? Being an stable equilibrium position just means that slight perturbations from that posi

An object can move through an equilibrium position due to momentum, no? Being an stable equilibrium position just means that slight perturbations from that position will be reduced by the forces acting on it. An unstable equilibrium means any perturbation away from the position will be increased-- thus the object may pass close to this point, but will never stay at because even the smallest deviation would cause it to leave.