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Right Hollow Circular Cone
This page provides a diagram and functioning calculator to compute the mass moment of inertia for a cone around it's z, x and y axes.
I
z
a
x
i
s
=
1
2
m
r
2
I_{z\ axis} = \frac{1}{2}mr^2
I
z
a
x
i
s
=
2
1
m
r
2
The following are the variables for the equations...
I = the moment of inertia (
k
g
/
m
2
).
h = the height of the cone (m).
m = the body's mass (kg).
r = distance between the centroid of the body and the axis, i.e. the radius (m).
I
x
/
y
a
x
i
s
=
1
4
m
(
r
2
+
2
h
2
)
I_{x/y\ axis} =\frac{1}{4}m(r^2+2h^2)
I
x
/
y
a
x
i
s
=
4
1
m
(
r
2
+
2
h
2
)
Moment of Inertia For An Octahedron Calculator
Inputs
Mass, m
:
10.00
kg
Cone height, h
:
5.00
m
Radius, r
:
4.00
m
Output
Moment of Inertia, I (z axis)
:
80.00
kg m^2
I
z
a
x
i
s
=
1
2
m
r
2
I_{z\ axis} = \frac{1}{2}mr^2
I
z
a
x
i
s
=
2
1
m
r
2
Moment of Inertia, I (x or y axis)
:
165.00
kg m^2
I
x
/
y
a
x
i
s
=
1
4
m
(
r
2
+
2
h
2
)
I_{x/y\ axis} =\frac{1}{4}m(r^2+2h^2)
I
x
/
y
a
x
i
s
=
4
1
m
(
r
2
+
2
h
2
)
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