Question

The displacement of a body starting from rest, and moving with an acceleration of $1{ms}^{-2}$ at the end of 5 s is ____ m.

• A. 12.5
• B. 25
• C. 7.5
• D. 15

Answer 1

The correct option is A 12.5

Given :

$a=1m/s^2$ $t=5s$
Initial speed of the body $u=0m/s$
Displacement of the body can be calculated using 2nd equation of motion

$S=ut+\frac{1}{2}a{t}^2$
$\Rightarrow S=0+\frac{1}{2}\times 1\times 5^2=12.5m$