Question

when the diameter of the circular section is doubled its radius of gyration is ​

Answer 1

Answer:

MOMENT OF INERTIA [I]=MR^2

IT IS QUANTITY WHICH DEPENDS ON YOUR POINT OF REFERENCE

AS PER THE DEMAND OF THE QUESTION

[M]MASS/[V]VOLUME=DENSITY[D]

SINCE DENSITY IS CONSTANT FOR A MATERIAL…RADIUS [r]DOUBLED

VOLUME=22/78r^2

=22/7*(2r)^2=4 times the initial volume

HENCE MASS WILL ALSO BE 4 TIMES THE INITIAL MASS

MOMENT OF INERTIA BEING DIRECTLY PROPORTIONAL TO MASS WILL ALSO BECOME FOUR TIMES THE INITIAL

Answer 2

Answer:

refer to the attachment

hope it's helps you