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Two particle A and B move with constant velocities v1 and v2 along two mutually perpendicular straight lines towards the intersection point O. At moment t= 0, the particles were located at distance L1 and L2 from O, respectively. Find the time when they are nearest and also this shortest distance

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Sorry earlier one is the solution of another question.

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Velocity b w.r.t a = V2vector -v1vector Position of b w.r.t a = Vector rb -vector r a Particle b will collide with particle a if the velocity of b w.r.t a is directed towards a Then vector v2-vector v1÷modulus of vector v2-vector v1=vector r2- vector r1÷ modulus of vector v2-vector r1

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