A mass 
hangs on a massless rod of length 
which rotates at a constant angular frequency. The mass 
moves with steady speed in a circular path of constant radius. Assume that the system is in steady circular motion with constant angular velocity 
. The angular momentum of 
about point 
is 
which lies in the positive 
direction and the angular momentum of 
about 
is 
. The correct statement for this system is:
and 
are both constant in magnitude and direction
is constant in direction with varying magnitude
is constant, both in magnitude and direction
is constant, both in magnitude and direction
Text Solution
Verified by ExpertsD
We know, 
Now with respect to A, we always get direction of 
along +ve 
-axis and also constant magnitude as mvr. But with respect to 
, we get constant magnitude but continuously changing direction.
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