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Byju's Answer
Standard XII
Physics
Radius of Gyration
The angular v...
Question
The angular velocity of a body changes from one revolution per
9
seconds to
1
revolution per second without applying any yorque the ratio of its radius of gyration in the two cases is.
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Solution
I
i
=
m
r
i
2
I
f
=
m
r
f
2
W
i
=
2
π
9
r
a
d
s
e
c
W
f
=
2
π
r
a
d
s
e
c
I
i
∗
W
i
=
I
f
∗
W
f
m
r
i
2
∗
2
π
9
=
m
r
f
2
∗
2
π
(
r
i
r
f
)
2
=
9
r
i
r
f
=
3
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