Q.

A particle moves with a constant velocity parallel to the X-axis. Its angular momentum with respect to the origin [UP CPMT 2015]

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a

is zero

b

remains constant

c

goes on increasing

d

goes on decreasing

answer is B.

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Detailed Solution

Consider the diagram.As, the particle goes with constant linear velocity, the perpendicular distance of velocity vector from the axis isconstant. So, angular momentum mvr sin θ is constant.
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A particle moves with a constant velocity parallel to the X-axis. Its angular momentum with respect to the origin [UP CPMT 2015]