#14 | MI: Continuous Bodies_2
(Physics) > Systems of Particles and Rotational Motion
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Three point masses ,m, each are placed at the vertices of an equilateral triangle of side a. Moment of inertia of the system about an axis COD passing through a mass m at and lying in the plane of COA & perpendicu- lar to OA is A) 2 ma (C) ^ ma? 7 na

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One solid sphere A and another hollow sphere B are of same mass and same outer radii. Their moment of inertia about their diameters are respectively IA and IB such that

1. IA=IB

2. IA>IB

3. IA<IB

4. IAIB=dAdB

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The radius of gyration of a uniform rod of length L about an axis passing through its centre of mass is 2/3 12 /3 /2

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Two uniform, thin identical rods each of mass Mand length l are joined together to form a cross. What will be the moment of inertia of the cross about an axis passing through the point at which the two rods are joined and perpendicular to the plane of the cross MIi2 6 Ml 12 Mi2 4 (d) ~- 3

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The moment of inertia of a rod about an axis through its centre and perpendicular to it is 12M (where M is the mass and L is the length of the rod). The rod is bent in the middle so that the two halves make an angle of 60°. The moment of inertia of the bent rod about the same axis would be MH CET 2001; AIIMS 2006; CBSE PMT 2008] (a) ML2 (b) ML 48 12 ML2 83 (c) AML2 24

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