A uniform rod of length 
is free to rotate in a vertical plane about a fixed horizontal axis through 
. The rod begins rotating from rest from its unstable equilibrium position. When it has turned through an angle 
, its angular velocity 
is given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
When the rod rotates through an angle 
, the centre of gravity falls through a distance 
.
In 
or 
Decrease in potential energy 
… (i)
The decrease in potential energy is equal to the kinetic energy of rotation.
… (ii)
From Eqs. (i) and (ii), we get
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