Question 4
A bolt weighting 10 N is accidently dropped down a 4 m longvertical cast-iron pipe which is closed by means of a rigid flangeat the end. Calculate:
4.1      The instantaneous stressinduced in the material of the pipe if the inside diameter of thepipe is 200 mm and the pipe wall thickness is 10mm.                       Â
4.2      The instantaneouselongation of thepipe.                                                    Â
4.3      The gradually appliedload that would produce the same stress as in4.1.  Â
           E = 140 GPa
