A body starts from rest with uniform acceleration. If its velocity after n seconds is υ , then its displacement in the last two seconds is

Question

A body starts from rest with uniform acceleration. If its velocity after n seconds is υ , then its displacement in the last two seconds is, 2 υ n + 1 n, υ n + 1 n, υ n - 1 n, 2 υ n - 1 n

MARKS App · Accepted Answer

Displacement in last 2 sec . S = 1 2 a n 2 - 1 2 a n - 2 2 S = a 2 2 n - 2 2 S = 2 a n - 1 But v = a n ∴ S = 2 n - 1 v n

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