Angular velocity $\omega$ of a particle P about point O is defined as $\omega =\frac{V_n}{OP}$ where $v_{n }$is the component of velocity pependicular to OP. A particle is moving with speed $10m{s}^{–1}$ along line AB. If OC=1m, find the angular velocity of the particle (in $rad{s}^{–1}$) about orgin O, when it is passing through point C