question about centroids for engineering.

[EstoMax]

hey

got a question im sure most of you who are further in engineering will answer this easily, but its extra credit for my 111 class.

so i have 2 shapes, a cylinder and a hemisphere on the bottom of the cylinder. with the two shapes combined, where is the total centroid?

i can find it for them individually, but im not sure if getting the centroid of the whole shape would be just averaging the 2 centroids or what?

TIA

max

[HillBilly]

give me dimensions and I'll figure it out for you.

[EstoMax]

well the extra credit part is that i gotta understand it :) so maybe u can write up a formula in paint or in here so i can do it otherwise she'll ask me whered i get the answer

but if u want the dimensions are these :

diameter of cylinder (and hemisphere) : 26.8 feet
length of cylinder : 36.3 feet

[HillBilly]

Mass: 25516.321
Volume: 25516.321
Bounding box: X: 2686.560 -- 2713.360
Y: 1434.275 -- 1461.075
Z: 0.000 -- 49.700
Centroid: X: 2699.960
Y: 1447.675
Z: 22.727
Moments of inertia: X: 53494887649.155
Y: 186027166245.865
Z: 239486746330.323
Products of inertia: XY: 99734701689.319
YZ: 839517763.690
ZX: 1565727511.678
Radii of gyration: X: 1447.928
Y: 2700.096
Z: 3063.598
Principal moments and X-Y-Z directions about centroid:
I: 5574441.235 along [1.000 0.000 0.000]
J: 5574441.235 along [0.000 1.000 0.000]
K: 2200369.074 along [0.000 0.000 1.000]


here ya go. If you want a formula, look in a book. i'm not giving you free extra credit

[Gondi Stylez]

^^:nut:

ill stick w/ science!

[HillBilly]

its not hard stuff.... must be a first year engineer or something.