A particle is moving in a straight line under constant acceleration. If the motion starts from rest, find the ratio of displacement in “n th" seconds to that in the n second
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a
n2
b
2n-1
c
( 2n-1)/n 2
d
n
answer is C.
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Detailed Solution
s =12 a n 2 s n = a(n-1 2) s n =a(n-½) (1) s= ½ an 2 (2) ∴ s n /s = (2n-1)/ n 2