A body starting from rest has an acceleration of `4ms^(-2)` . Calculate distnce travelled by it in 5th second.

Explanation

Given, `u=O, a=4 ms^(-2)`
Distance travelled in 5th second
`s_(n)=u+(1)/(2)a(2n-1)`
`s_(5)=0+(1)/(2)xx4(2xx5-1)=(1)/(2)xx4(9)=(36)/(2)=18 m`