How to rest all state

[_gaoyu_]

I disable ObiActor and rest partcle position . wait 0.5 second , I enabled ObiActior ,but I found previous Acceleration still exist. Why?

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code:

                GetComponent<ObiActor>().enabled = false;
                GetComponent<SkinnedMeshRenderer>().enabled = false;
                transform.position = new Vector3(Random.Range(-4.0f,4.0f),1.5f,Random.Range(-4.0f,4.0f));

                GetComponent<ObiActor>().Solver.positions[pId] = transform.position;
                GetComponent<ObiActor>().Solver.velocities[pId] = new Vector3(0.0f,0.0f,0.0f);

                yield return new WaitForSeconds(0.5f);

                GetComponent<ObiActor>().enabled = true;
                GetComponent<SkinnedMeshRenderer>().enabled = true;