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A particles P moves with speed v along A...

A particles `P` moves with speed `v` along `AB` and `BC`, sides of a square `ABCD`. Another particle `Q` also starts at `A` and moves with the same speed but along `AD` and `DC` of the same square `ABCD`. Then their respective changes in velocities are

A

equal in magnitude but different in directions

B

different in magnitude but same in directions

C

different both in magnitude and direction

D

same both in magnitude and direction

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The correct Answer is:
A
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