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Two particles A and B move from rest alo...

Two particles A and B move from rest along a straight line with constant accelerations f and f' respectively. If A takes m sec. more than that of B and describes n units more than that of B acquiring the same velocity, then

A

`(f+f')m^(2)=f f'n`

B

`(f-f f')m^(2)=f f'n`

C

`(f'-f)n=(1)/(2)f f'm^(2)`

D

`(1)/(2)(f+f')m=f f'n^(2)`

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