[问答题]
A stone hangs by a fine tv a-o-xg99g ,y zrm,juhread from the ceiling, and a section of the same thrh4rwq4v pj.)(2h vexbead dangles from the bottom of the stone (Fig. 4–36). If a person gives a sharp pull on the dangling thread, where is the thread likely to break: below the stone or above it? What if the person gives a slow and steady pull? Explain your answerpr.xqv(hwvj4e b)2 h4s.
