Two particles A and B, move with constant velocities 
and 
. At the initial moment, their
position vectors are 
and 
respectively. The condition for particles A and B for their collision is
Text Solution
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For two particles A and B move with constant velocities 
and 
. Such that two particles to
collide, the direction of the relative velocity of one with respect to other should be directed towards the relative position of the other particle.
i.e. 
direction of relative position of 1 w.r.t. 2.
Similarly, 
direction of velocity of 2 w.r.t. 1.
So, for collision of A and B, we get
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