First slide

Angular momentum

Question

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

Easy

A

is zero
B

remains constant
C

goes on increasing
D

goes on decreasing

Solution

Consider the diagram.
As, the particle goes with constant linear velocity, the perpendicular distance of velocity vector from the axis is
constant. So, angular momentum mvr sin $θ$ is constant.

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