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    We have two particles, P and Q, each travelling at Vp and Vq. We are told that it is IMPOSSIBLE for Q to intercept P, but I have to find the best course for the closest approach. If we fix P, why is it that the relative velocity of Q (qVp) has to be tangential to the possible directions of Vq (which is in a circle of radius mod(Vq))
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    Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
 
 
 
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Updated: March 11, 2018

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