Assume that the least load which would break a thread when simply suspended from it is M and that this load produces a strain of 1 percent at the moment of breaking. Also assume that Hooke's law applies to the thread right up to breakingpoint. A load of mass m is suspended from a thread of length `lambda`. It is raised to a height and released. Find the least height to which the load must be raised so that it will will break the thread when allowed to fall.

Answer

`h = (0.01 M l)/(2m)`