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Test Index
Class 11 NEET Physics System of Particles and Rotational Motion
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© examsnet.com
Question : 28
Total: 109
Two rotating bodies A and B of masses m and 2m with moments of inertia
I
A
and
I
B
(
I
B
>
I
A
)
have equal kinetic energy of rotation. If
L
A
and
L
B
be their angular momenta respectively, then
[NEET 2016 P2]
L
A
>
L
B
L
A
=
L
B
2
L
A
=
2
L
B
L
B
>
L
A
Validate
Solution:
K
E
A
=
K
E
B
1
2
I
A
ω
A
2
=
1
2
I
B
ω
B
2
⇒ since
I
B
>
I
A
so
ω
B
<
ω
A
1
2
L
A
ω
A
=
1
2
L
B
ω
B
⇒
L
B
>
L
A
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