Which one of the following is a null vector

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Net displacement of a particle moving once around, a circle

velocity of a body projected vertically up, when the body is at the highest point

acceleration of a particle executing S.H.M. at the mean position

all the above

answer is D.

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Detailed Solution

After completion of 1 revolution displacement =0 ( initial and final points are same)final velocity of a body projected vertically upwards =0acceleration of a Simple harmonic oscillator at mean position=0

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