- #1
petitericeball
- 24
- 0
Hey, I was doing some problems involving finding the moment of inertia of a spun spandrel, and I came across the idea of using the centroid to find the moment.
For example, if you have a parabola, find the centroid. If you're rotating around the x-axis (y=x^2), then find y_bar and multiply the total mass by y_bar^2 (or x_bar^2 for Iyy). This isn't working, but it seems like it should. Can anybody explain why?
For example, if you have a parabola, find the centroid. If you're rotating around the x-axis (y=x^2), then find y_bar and multiply the total mass by y_bar^2 (or x_bar^2 for Iyy). This isn't working, but it seems like it should. Can anybody explain why?