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Two particles A and B move on a circle I...

Two particles `A and B` move on a circle Initially, particles `A and B` are diagonally opposite to each other. Particle `A` moves with angular velocity `pi rad s^-1` and angular acceleration `pi//2 rad s^-2` and particle `B` moves with constant angular velocity `2 pi rad s^-1`. Find the time after which both the particles `A and B` will collide.

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