Two particles start from the same point on a circular track and move in opposite directions with angular speeds 4 rad/s and 6 rad/s. Their first meeting after start occurs after:
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Question

Two particles start from the same point on a circular track and move in opposite directions with angular speeds 4 rad/s and 6 rad/s. Their first meeting after start occurs after:

G1 Physics · Accepted Answer

For opposite directions, relative angular speed is 4+6=10 rad/s. They meet when their relative angular displacement first becomes 2π: 10t=2π, so t=π/5 s.