A circle of radius unity is centered at thet origin. Two particles tart moving at the same time from the point `(1, 0)` and move around the circle in opposite direction. One of the particle moves anticlockwise with constant speed `v` and the other moves clockwise with constant speed `3v`. After leaving `(1, 0)`, the two particles meet first at a point `P,` and continue until they meet next at point `Q `. The coordinates of the point `Q` are