Question

1) Determine the y the centroid of cross area of the T- %am shown. (y) 2) Determine the moment of inertia 30 m 200 c section.( 3) Determine the moment of inertia with

Answer 1

30 m m 200 m m 30 mm 2.00 mm.

Let Flange df the secionm be area Y A Web the sechom be Gr Centroid A area 2A enrro1 2- yl z Centroid deston ceơtA, from 'referen ce am reerence apo t's ah the bottom of the. Seche, 2. 2 re ference anis at the bortom. Cemtroid f whele secior

erenceanis at the bottom 200x30 = 6000, mm2 Al s IS mm -2 3 0 2. At A 6000十6000 As the. Se chơn is sy m metrical ag onrRyú ais i dividing the se.chion in h wo equa halres

Momemt of ineria about Xansis e n \の ushere. Gx, 12 D = Depth of Al 200 x 30 Gi x 12- 2 3 0 x 20o 1 2 2 xlo mm 450000十6000 (72. 5-15) 21 60o (11-5 13) ,1,,- hs.

are zero x, x G12 B1 ナ 1 2 1 2. 200 x 303 30x 20o 1 2 12,-, + b m 2 3