In the above problem if 
is the angular momentum about the axis CO, then,
A
is constant
B
only direction of 
is constant
is constant
C
only magnitude of 
is constant
is constant
D
none of the above.
Text Solution
Verified by ExpertsThe correct answer is:
A
The angular momentum about axis CO is the component of angular momentum about point C along the line CO. This is constant both in direction and magnitude.
Aliter : Torque about axis CO is zero hence L about CO is constant in both direction and magnitude.
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