Q: A body moves with constant velocity v in a straight line parallel to x-axis. The angular momentum with respect to origin is
(a) Zero
(b) Constant
(c) Continuously increase
(d) Continuously decrease
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Ans: (b)
Sol: The magnitude of the angular momentum of a particle about a fixed point is equal to the product of its linear momentum and the length of the perpendicular to the linear momentum from the fixed point O.
Hence , The angular momentum with respect to origin is Constant .