A body starting from rest covers a distance of 9 m in the fifth second. The acceleration of the body is:

Options

A. `2 m//s^(2)`
B. `0.2 m//s^(2)`
C. `1.8 m//s^(2)`
D. `4 m//s^(2)`

Answer

A

Explanation

`s_(n th) = u + (a)/(2) (2n - 1)`
`9 = 0 + (a)/(2) (2 xx 5 - 1)`
`:. A = 2 m//s^(2)`