Particles A and B are traveling around a circular track at a speed of 8 m/s at the instant...

Particles A and B are traveling around a circular track at a speed of 8 m/s at the instant shown. If the speed of B is increasing by (at)B = 4 m/s2, and at the same instant A has an increase in speed of (at)A = 0.8t m/s2, determine how long it takes for a collision to occur. What is the magnitude of the acceleration of each particle just before the collision occurs?