Question

need an explanation as to why the answer is D. Thanks

You have been asked to hang a metal sign of uniform density from a single vertical string. The sign has the triangular shape shown in the figure below. Joe's Cheese Shop The bottom of the sign, of length a, is to be parallel to the ground. At what distance from the left end of the sign should you attach the support string? 1 ХСМ 2a2 Хсм ЗЬ 2a3 Хсм 3b2 2a Хсм 3

Answer 1

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Center of Mass? t To supportstring we need to clamped in such a way that net torone is zero about point'o. It means line of connecting string must passing through COM. we know Center of mass of triangular lamina is located at /h from base 1 clearly, from lett end it is at [see fisure]. (2a) And