Systems Of Particles And Rotational Motion

Physics
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The position of axis of rotation of a body is changed so that its moment of inertia decreases by 36%. Find the % change in its radius of gyration.

A
It decreases by 18%
B
It increases by 18%
C
It decreases by 20%
D
It increases by 20%
Medium
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The radius of gyration of a rotating metallic disc is independent of which of the following physical quantity.

A
Position of axis of rotation
B
Mass of disc
C
Radius of disc
D
Centre of mass of disc
Medium
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A brass disc is rotating about its axis. If temperature of the disc is increased then its:

A
radius of gyration increases, but moment of inertia remains the same
B
moment of inertia increases but radius of gyration remains the same
C
radius of gyration and moment of inertia both remain the same
D
radius of gyration and moment of inertia both increases
Medium
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