There is no (or very small) restoring force in a gas.

Potential energy is often associated with restoring forces such as a spring or the force of gravity.

To understand the idea of a restoring force, imagine a guitar string.

It is analogous to rubber bands and their restoring force.

Grass, water, and sand have a restoring force tending to pull it back.

The key characteristic of an acoustic wave is a restoring force operating.

The restoring force that allows them to propagate is surface tension.

Unless the pressure of a gas is very high, there are no restoring forces to overcome the impinging force.

When air molecules collide, they also bounce away from each other (a restoring force).

A spring provides restoring force to keep the platform in contact with the actuator.

When the mass moves closer to the equilibrium position, the restoring force decreases.

The restoring force is a function only of position of the mass or particle.

Once the mass is displaced from its equilibrium position, it experiences a net restoring force.

The wave moves through elastic media, and the main restoring force comes from shear effects.

A fairly stiff restoring force is required to hold the armature in the 'balance' position.

If the expansion occurs too close to the surface then there may be no restoring force to create a pulsation.

A restoring force with this characteristic is called a harmonic force.

Restoring forces due to bringing the buoyancy/weight equilibrium out of balance.

For actuation, there has to be an applied force and a restoring force.

That is, the restoring force is exactly proportional to the distance to the center of rotation.

The elasticity of the material provides the restoring force of the wave.

At the equilibrium position, the net restoring force vanishes.

Ions in a quadrupole field experience restoring forces that drive them back toward the center of the trap.

In other cases, the restoring force is simple gravity and this is called a g-mode.

Their major restoring force is the change in Coriolis force with latitude.