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Question

Two points A and B move from rest along a straight line with same acceleration f and f respectively. If A takes m sec more than B and describes n units more than B in acquiring the same speed then
  1. (ff)m2=ffn
  2. (ff)n=12ffm2
  3. (f+f)m2=ffn
  4. 12(f+f)m=ffn2

A
(ff)m2=ffn
B
(ff)n=12ffm2
C
(f+f)m2=ffn
D
12(f+f)m=ffn2
Solution
Verified by Toppr

v2=2f(d+n)=2fd

v=f(t)=(m+t)f

eliminate d and m we get (ff)n=12ffm2

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