Two cyclists, A and B, are traveling counterclockwise around a circular track at a constant speed of 8 ft/s at the instant shown. If the speed of A is increased at (a_t)_A = (s_A) ft/s², where s_A is in feet, determine the distance measured counterclockwise along the track from B to A between the cyclists when t = 1s. What is the magnitude of the acceleration of each cyclist at this instant?

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SA 0 = 120° r = 50 ft IB SB