A dancer is standing on a stool rotating about the vertical axis passing through its center. She pulls her arms towards the body reducing her moment of inertia by factor of 
. The new angular speed of turn table is proportional to
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Since, no external torque is acting the angular ( 
) is conserved.
constant
Where 
is moment of inertia and 
the angular velocity.
Given, 
Hence, angular velocity increases by a factor of.
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