Question

What is the acceleration, if the body starts from the rest and travels a distance of $s\text{m}$ in $2$ seconds?

• A. $\frac{2}{3}s{\text{m/s}}^2$
• B. $\frac{3}{2}s{\text{m/s}}^2$
• C. $\frac{1}{3}s{\text{m/s}}^2$
• D. $\frac{1}{2}s{\text{m/s}}^2$

Answer 1

The correct option is D $\frac{1}{2}s{\text{m/s}}^2$

Given:
$u=0$
$t=2\text{s}$

Using,

$d=ut+\frac{1}{2}a{t}^2$

$\Rightarrow s=0+\frac{1}{2}\times a\times 2^2$

$\Rightarrow a=\frac{s}{2}{\text{m/s}}^2$

Hence, option $\left(D\right)$ is the correct answer.