Problem 7: Particles A and B are traveling around a circular hoop at a speed of 8 m/s at the instant shown. If the speed of B is increasing at

constant 4 m/s², and the speed of A is increasing at 0.8t m/s²,determine: (a) The time tc at which the particles will collide. (b) The magnitude of the accelerations of both particles just before the collision occurs.