The distance between two moving particles P and Q at any time is a. If v_rbe their relative velocity and if u and v be the components of v_r , along and perpendicular to PQ, The closest distance between P and Q and time that elapses before they arrive at their nearest distance is

The distance between two moving particles P and Q at any time is a. If

1.	The distance between two moving particles P and Q at any time is a. If v_rbe their relative velocity and if u and v be the components of v_r , along and perpendicular to PQ, The closest distance between P and Q and time that elapses before they arrive at their nearest distance is
Answer» `(a(v+v_r))/(v) ,a (1+(v_r)/(u))^2` `(av)/((v+v_r)), a (1+(u)/(v_r))^2` `(av_r)/(v), (av_r)/(u^2)` `(av)/(v_r) , (AU)/(v_r^2)` ANSWER :D