Question

The velocity of a body, starting at rest and freely falling towards Earth, after one second is ___ m/s. (Round your answer to the nearest integer)

Answer 1

For a body in free fall, its acceleration $a$ is equal to acceleration due to gravity $g.$
$a=g=9.8m/s^2$.
initial velocity $u=0$
time $t=1s$
final velocity $v$ is given by
$v=u+at$
$v=0+9.8\times 1=9.8m/s$

Rounding off to the nearest integer would result in 10 m/s.