Question

Describe the motion of a body which is accelerating at a constant rate of $10m{s}^{-2}$. If the body starts from rest, how much distance will it cover in $2s$?

Answer 1

The velocity of this body is increasing at a rate of '$10$ metres per second'. every second.
Initial velocity, $u=0m/s$
Time, $t=2s$
Acceleration, $a=10m/s^2$
Using the second equation of motion,

$s=ut+\frac{1}{2}a{t}^2$
$=0\times 2+\frac{1}{2}\times 10\times 2\times 2$
$=0+20=20m$