- #1
jiboom
- 91
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Find the second moment of area about the vertical axis for the cross-section of the follwing shape.
i can't get the pic to paste so will describe it:
it is a rectangle of horizontal length 8 and vertical height 6.
if we let (0,0) be at the lhs bottom corner, then a circle has been cut out with
centre at (5,3)
i have no idea how to go about this. one web page says i need integral y^2dxdy another just used the c of mass of one shape and the other shape (was L shape). (so here i would need com of rectangle- com circle)
any help would be much appreciated.
i can't get the pic to paste so will describe it:
it is a rectangle of horizontal length 8 and vertical height 6.
if we let (0,0) be at the lhs bottom corner, then a circle has been cut out with
centre at (5,3)
i have no idea how to go about this. one web page says i need integral y^2dxdy another just used the c of mass of one shape and the other shape (was L shape). (so here i would need com of rectangle- com circle)
any help would be much appreciated.