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Q.

Statement -A : The acceleration vector of a particle in uniform circular motion averaged over one cycle is a null vector
Statement -B : The average speed of a particle is either greater or equal to the magnitude of average velocity of the particle over the same interval of the time.

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a

A only true

b

Both A & B are false

c

Both A & B are true

d

B only true

answer is C.

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Detailed Solution

For a complete cyclic path in uniform circular motion,

 ∆V→=0 →

Hence, the acceleration is null vector.

Displacement ≤ Path length

Hence, |average velocity| ≤ average speed

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