Two uniform identical rods each of mass M and length l are joined to form a cross

+2 votes
23 views
asked Feb 28, 2018 in JEE by Ghanshyam mishra (385 points) 1 15
recategorized Feb 28, 2018 by Annu Priya

Two uniform identical rods each of mass M and length l are joined to form a cross as shown in figure (10-W15). Find the moment of inertia of the cross about a bisector as shown dotted in the figure.

please solve it !

1 Answer

+2 votes
answered Feb 28, 2018 by Annu Priya (18,055 points) 24 45 82
selected Feb 28, 2018 by Ghanshyam mishra
 
Best answer

2x1/12 ml2 sin245 = ml2/12

So, moment of inertia of the cross about bisector is I = ml2/12

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