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Two particles X and Y, of equal masses a...

Two particles X and Y, of equal masses and with unequal positive charges, are free to move and are initially far away from each other. With Y at rest, X begins to move towards it with initial velocity u. After a long time, finally:

A

If Y is fixed , bith P and E are conserved

B

If Y is fixed, E is conserved nut p is not conserved

C

If both are free to move , P is conserved but E is not conserved

D

If both are free , E is conserved , but P is not conserved

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The correct Answer is:
B
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