Thread
:
Moment of inertia of a rectangular prism
View Single Post
benhou
#
13
Jan22-10, 07:58 PM
P: 123
Quote by
Bob S
∫
_{-y/2}
^{+y/2}
∫
_{-x/2}
^{+x/2}
ρ[x
^{2}
+y
^{2}
] dx dy =2∫
_{o}
^{x/2}
ρyx
^{2}
dx +2∫
_{o}
^{y/2}
ρxy
^{2}
dy
wait, how did the dy become y and dx become x? This was the derivation of the rectangular prism formula.