Moment of Inertia help

1. Nov 4, 2006

dtesselstrom

Determine the moment of inertia about the axis of the object shown in the figure. Enter your answer in terms of L, M, m1, and m2.

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Last edited: Nov 4, 2006
2. Nov 4, 2006

Galileo

What have you tried so far?

By the way, this belongs in the homework section.

3. Nov 4, 2006

dtesselstrom

ok sorry for posting in wrong section.
Ive tried 1/12(m1+m2+M)*L^2 and 1/12(m1+m2+M)*L^2+1/4*m1*L^2-1/16*m2*L^2

Last edited: Nov 4, 2006
4. Nov 4, 2006

Galileo

The moment of inertia of an object about an axis is just the sum of the moments of inertia of its constituents about that axis; i.e. in this case:
$$I=I_{rod}+I_{m1}+I_{m_2}$$

What do you get for these seperate moments of inertia?