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Class 11 NEET Physics System of Particles and Rotational Motion
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© examsnet.com
Question : 72
Total: 109
Two bodies have their moments of inertia
I
and
2
I
respectively about their axis of rotation. If their kinetic energies of rotation are equal, their angular velocity will be in the ratio
(2005)
2
:
1
1
:
2
√
2
:
1
1
:
√
2
Validate
Solution:
K
.
E
.
=
1
2
I
ω
2
∴
1
2
I
1
ω
1
2
=
1
2
×
2
I
1
ω
2
2
ω
1
2
ω
2
2
=
2
1
⇒
ω
1
ω
2
=
√
2
1
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