posted by Andrew on .
A 790kg boulder is raised from a quarry 188m deep by a long uniform chain having a mass of 600kg . This chain is of uniform strength, but at any point it can support a maximum tension no greater than 3.00 times its weight without breaking.
tension= weight held up= weight chain below+ weight bolder
tension= (790+600)g That is the tension at the top, and of course, the tension at the bottom is 790g, so tension varies on the length. If it breaks, it is at the top. Here, tension cannot be greater than 3*600*g. Is it?