Solve this :

In uniform circular motion particle moves with speed 5 m/s, then the change in magnitude of velocity of particle, when it moves from position A to B is
a )     5 2     m / s b )     10   m / s c )     Z e r o d )     2 . 5   m / s  

Ans: c zero because there is no change in magnitude if any vector change it's position.
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