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A particle is moving along a circular path with a constant speed 30 m/s. What is change in velocity of a particle, when it describes an angle of 90° at the centre of the circle? 

A) zero 

B)30√2 m/s 

C) 60√2 m/s 

D) \(30\over \sqrt2\)  m/s

 

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Correct Answer is option B) \(30\sqrt2\) 

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