According to the kinetic theory of matter, at absolute zero (0 Kelvin or -273.15 degrees Celsius), particles would have zero kinetic energy. This means they would be completely motionless, with no vibration or movement whatsoever.

However, there are some important caveats:

* Quantum mechanics: The kinetic theory is a classical model. Quantum mechanics introduces the concept of zero-point energy, meaning even at absolute zero, particles still have a tiny amount of residual energy. This means they wouldn't be truly motionless.

* Practical impossibility: It's practically impossible to reach absolute zero. We can get incredibly close, but achieving it would require a perfect vacuum and a complete absence of any energy interactions, which are impossible to achieve in the real world.

So, while the kinetic theory predicts no motion at absolute zero, the reality is more nuanced due to quantum effects and the practical impossibility of reaching absolute zero.