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Standard XII
Physics
Rotational Work and Energy
A flywheel of...
Question
A flywheel of moment of inertia
0.32
k
g
−
m
2
is rotated steadily at 120 rad/sec by an electric motor. The kinetic energy of the flywheel is
A
4608 J
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B
1152 J
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C
2304 J
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D
6912 J
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Solution
The correct option is
C
2304 J
Kinetic energy,
K.E.
=
1
2
I
ω
2
=
1
2
(
0.32
)
(
120
)
2
=
2304
J
.
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