🏹 Tnpsc - To the point 🎯

🍁 Important for JDO Exams 🍁 1. The first moment of inertia : The first moment of area, sometimes misnamed as the first moment of inertia. It is to the moment of area equals the summation of area times distance to an axis [Σ(a x d)]. 2. Second moment of Inertia : It means the distance to each element of area or mass is raised to the second power. Σ r * dA = first moment of area Σ r * dm = first moment of mass Σ r2 * dA = second moment of area Σ r2 * dm = second moment of mass = moment of inertia 3. Section modulus : It is a geometric property for a given cross-section used in the design of beams or flexural members. The elastic section modulus is defined as S = I/y. 4. Polar modulus : It is defined as the ratio of the polar moment of inertia to the radius of the shaft. It is also called as torsional section modulus. It is denoted by Zp. 5. Shape factor : It is defined as the ratio of the plastic moment and the yield moment of the section. It is a function of the cross-section form or shape #som #crackjdo Join 👉 @tnpsctothepoint