[SerializeField] float gravity = 10;

public void Attract ( Transform target )
{
    Vector3 gravityUp = (target.position - new Vector3(transform.position.x, transform.position.y,target.position.z)).normalized;
    Vector3 bodyDown = -target.up;

    Rigidbody rb = target.GetComponent<Rigidbody>();
    rb.AddForce(gravityUp * gravity);

    Quaternion targetRotation = Quaternion.FromToRotation(bodyDown, gravityUp) * target.rotation;
    targetRotation.x = 0;

    target.rotation = Quaternion.Slerp(target.rotation, targetRotation, 30.0f * Time.deltaTime);

}