An important observation that can be made here is that the success of this method depends mainly on the proper choice of the parts f1 and f2. We have been unable to establish any criterion to judge what forms of f1 and f2 can be assumed to yield the acceleration demanded. It appears that trials are the only criteria that can be applied so far. The criterion of dividing the function f into two practical parts f1 and f2, and the case where f consists only of one term will be examined in a further study.