A body starts from rest with uniform acceleration $a,$ its velocity after $n\,seconds$ is $v$. The displacement of the body in last $3\,s$ is : (assume total time of journey from $0$ to $n\,seconds$ )
A body starts from rest with uniform acceleration $a,$ its velocity after $n\,seconds$ is $v$. The displacement of the body in last $3\,s$ is : (assume total time of journey from $0$ to $n\,seconds$ )
- A
$\frac{{v(6n - 9)}}{{2n}}$
- B
$\frac{2{v(6n - 9)}}{{n}}$
- C
$\frac{2{v(2n + 1)}}{{n}}$
- D
$\frac{2{v(n - 1)}}{{n}}$
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- [AIEEE 2005]
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