You have a simple pendulum(length l) whose bob(rectangular bob, mass M) is filled with water(mass m) and you are going up on a lift with acceleration g. The length of the thread from which the bob is hung is h. The pendulum is set into S.H.M. You make a small hole in the bob so that the water inside comes out. What is the maximum possible time period of the simple pendulum? .. Is it possible to determine the maximum time period with the given information or is extra information given in the question?..... I dont know the answer. I created the problem and I dont know whether the hypothesis is enough or more than enough. But the problem can be solved!!! So try it!!