(5) The bent uniform slender bar of mass 2m and length 2L is suspended by the two strings as shown. Immediately after string A is cut, determine (a) the shear force at the midpoint of AB section and (b) the bending moment at the midpoint of the BC L A section. Ans: (a) -2mg/13(b)-7mgL/104 2m

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Bending Moment

In general, we can define the bending moment as the reaction induced when a certain amount of load or force is applied to an element which makes it bend.