Question

A body starts from rest and moving with an acceleration of $1{\text{ms}}^{–2}$. The displacement of the body in $5$ seconds is

• A. $12.5\text{m}$
• B. $25\text{m}$
• C. $7.5\text{m}$
• D. $15\text{m}$

Answer 1

The correct option is A $12.5\text{m}$

Given,
$u=0,a=1{\text{ms}}^{-2},t=5\text{sec}$
From $2^{nd}$ equation of motion, we have
$s=ut+\frac{1}{2}a{t}^2=0+\frac{1}{2}\times 1\times 5^2=12.5\text{m}$