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moment of inertia =Sum[ mass x distance^2]
where the distance is the distance from the chosen rotation axis
a) here, moment of inertia =
(2.7+2.1+4.5+2.3)3^2 = 104.4kgm^2
because each mass is 3 m from the x axis
b) now we consider distances from the y axis; each mass is 2m from the y axis:
c) the distance from the rotation axis is now found from the pythagorean theorem
Please let me know if you need any clarification. I'm always happy to answer your questions.
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