Question

A body starts from rest, and moves with an acceleration of $1m{s}^{-2}$. The displacement (in $\text{m}$) of the body in $5$ seconds is

• A. $12.5$
• B. $25$
• C. $7.5$
• D. $15$

Answer 1

The correct option is A $12.5$

Given, $u=0,a=1m{s}^{-2},t=5s$
Displacement of the body is given as
$s=ut+\frac{1}{2}a{t}^2$
$\Rightarrow s=0+\frac{1}{2}\times 1\times 5^2=12.5\text{m}$