- #1

- 8

- 0

How do you calculate this? I suppose it could be seen as two cylinders, one small radius big thickness, one large radius small thickness, but how do i sum these together and how do i calculate this.

Thanks.

- Thread starter jfrusciante
- Start date

- #1

- 8

- 0

How do you calculate this? I suppose it could be seen as two cylinders, one small radius big thickness, one large radius small thickness, but how do i sum these together and how do i calculate this.

Thanks.

- #2

- 119

- 2

Try using the parallel axis and perpendicular axis theorems.

Parallel axis theorem: The moment of inertia (MoI) of a body about any axis parallel to an axis passing through its center of mass (CoM) is equal to the sum of the MoI about the CoM and its mass*(the distance between the two axes ).

Perpendicular axis theorem. The sum of MoI's of a plane body about two perpendicular axes through its plane is equal to the MoI of the body about an axis perpendicular to the plane and passing through the point of intersection of the two previous axes.

tell me if that helps.

spacetime

http://www.geocities.com/physics_all/index.html

- #3

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- 0

Thanks for your help.

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