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Angular Analogue of Linear Momentum

Angular veloc...

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Angular velocity of the particle becomes four times of its initial angular velocity in two seconds if initial angular velocity of a particle is 4RAD per second then average angular acceleration of particle is

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Two particle A and B move on a circle. Initially Particle A and B are diagonally opposite to each other. Particle A moves with angular velocity $π \frac{r a d}{s e c}$ , angular acceleration $\frac{π}{2} \frac{r a d}{s e c^{2}}$ and particle B moves with constant angular velocity $2 π \frac{r a d}{s e c}$ . Find the time after which both the particle A and B will collide.

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