Point \( A \) moves uniformly with velocity \( v \) so that the vector \( v \) is continually "a...

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Point \( A \) moves uniformly with velocity \( v \) so that the vector \( v \) is continually "aimed" at point \( B \), which in its turn moves rectilinearly and uniformly with velocity \( uv \). At the initial moment of time \( \nu \perp u \) and the points are separated by a distance l. How soon the points colliverge ?
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