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## Homework Statement

A particle is moving parallel to x-axis in the positive direction with velocity v such that at all the instants the y -axis component of its position vector is constant and is equal to 'b'. Find angular velocity about origin.

## Homework Equations

## The Attempt at a Solution

I thought that angular velocity would be the rate of change of the angle of the position vector of the particle with the origin, let's say theta. So I wrote tan (theta) = b/x and differentiated with time but got the wrong answer.