Two identical point charges are moving in free space when they are 60 cm apart their velocity vectors are equal in modulus and

Question

Two identical point charges are moving in free space when they are 60 cm apart their velocity vectors are equal in modulus and make angles of 45 from the line joining them as shown in the figure at this instant their total kinetic energy i equal to their potential energy what will be the distance of closest approach between them 45 60 cm 45

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