Recent content by erin

Thanks. I re-did the integral and got -3/8. The integral is for the y-coordinate for the centre of mass so I don't understand why I am getting a negative number? Do you have any further insights? Thanks for your help.

Hi All, Question: Consider the tetrahedron, T, bounded by planes x=2, y=0, z=0 and 3x-6y-2z=0. Determine the integral \iiintyDV which is the y coordinate of the centre of mass. I am getting a negative area which leads me to believe I'm doing something wrong. Working is attached. Help would...

Hi chisigma, yes that is the integral I want to evaluate. Thanks for writing it out properly - are there instructions for how to use the maths symbols somewhere on this forum? I can't find them. Cheers, Erin

Well obviously if I knew how to do it I wouldn't have posted. Your answer was very helpful. Thank you. I wish I was as smart as you.

Hi, I need to evaluate the following double integral. I have tried direct integration but the answer is too complicated for it to be a viable method. First integral is from 0 to (1-y^2) function is (x^2+y^2)dx. Second integral is from 0 to 1 dy. I can't figure out how to use the maths thing...