'l' पाट (span) वाली एक सरल समर्थित धरन के मध्य-पाट पर एक बिंदु भार W लगा है। धरन के केंद्र पर अधिकतम विक्षेपण (deflection) क्या होगा?

When a bar of length l and uniform cross-section is rigidly fixed at the upper end and hangs freely, the total elongation produced in the bar due to its own weight is given by (where w = weight per unit volume and E = Modulus of Elasticity):

The hoop stress set up in a thin cylinder subjected to internal fluid pressure is: