A rod 
of mass 
and length 
is hinged at end 
. The rod is kept horizontal by a massless string tied to point 
as shown in figure. When string is cut, the initial angular acceleration of the rod is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
When the string is cut, the rod will rotate about 
. Let 
be initial angular acceleration of the rod.ThenTorque, 
(i)
(Moment of inertia of the rod about one end 
)
Also, 
(ii)
Equating (i) and (ii), we get
or 
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