A body is moving from rest under constant acceleration and let S1 be the displacement in the first (p-1) sec and S2 be the displacement in the first p sec. The displacement in (p2-p+1)th sec. will be
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a
S1 +S2
b
S1S2
c
S1-S2
d
S1/S2
answer is A.
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Detailed Solution
From S = ut + 12at2S1 = 12a(P-1)2 and S2 = 12a P2 [As u = 0]From Sn = u+a2(2n-1)S(P2-P+1)th = a2[2(P2-P+1)-1] = a2[2P2-2P+1]It is clear that S(P2-P+1)th= S1+S2