Two particles A and B start simultaneously from the same point on a circular track and move in the same direction with constant angular speeds 5 rad/s and 3 rad/s, respectively. They meet again after:
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Question

Two particles A and B start simultaneously from the same point on a circular track and move in the same direction with constant angular speeds 5 rad/s and 3 rad/s, respectively. They meet again after:

G1 Physics · Accepted Answer

Relative angular speed in the same direction is |ω_A−ω_B|=2 rad/s. For the first reunion after start, the faster particle must gain 2π rad: 2t=2π, so t=π s.