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116.The position vector of a particle is given by rTo1-at)t, where t is the time and a as well as ro areconstant. After what time the particle returns tothe starting point?(3) a2(4) 32

Answer»

when particle is at starting point , displacement will be 0

=> r = 0=> (1-at)t = 0=> at = 1=> t =1/a



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