Three identical thin rods each of length l and mass M are joined together to form a letterH . What is the moment of inertia of the system about one of the sides ofH ?
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a
Ml24
b
Ml23
c
2M l23
d
4M l23
answer is D.
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Detailed Solution
Moment of inertia of the system about rod X,I=IX+IY+IZ=0+(M l212+M l24)+M l2 =43 M l2
Three identical thin rods each of length l and mass M are joined together to form a letterH . What is the moment of inertia of the system about one of the sides ofH ?