CALCULATION OF THE MOMENT OF INERTIA REGARDING THE Y AXIS | STATICS: MECHANICS FOR ENGINEERING

In today's video we will learn how to determine the moment of inertia about the y-axis of the "I" section.
The first thing to note before calculating the moment of inertia is whether we know the location of the centroid of the section or whether we will have to determine it. In the problem in question, we know its location because it is a symmetrical section.
Next, note that the section is composed of three rectangles, so we have to determine the moment of inertia about the y-axis of each rectangle separately, and only then can we find the moment Iy of the section by the sum of the moments of inertia obtained.
Iy = Iy1 + Iy2 + Iy3
Pretty simple, isn't it?
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📚 Source: Statics: Mechanics for Engineering 14th Ed. (R.C. Hibbeler)
🔴 See also: Calculation of the centroid and moment of inertia of the T-beam👇:
• Cálculo do CENTROIDE e...
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[@user-iu4ds2lq2i]

Muito obrigado pela aula, professor. Essa questão caiu na prova e infelizmente eu errei por não estar devidamente preparado.

[@user-xk2kd2xc1o]

em relação ao eixo y não seria h*b^3 ?

[@user-yt5lu7lh1u]

sim, por esse motivo a base 200 está elevada na 3

[@user-iu4ds2lq2i]

Sim, é isso mesmo. Se você jogar os números na fórmula, verá que bate: h= 50, b= 200^3.