Question

The velocity of a freely falling body one second after being dropped is

• A. $11m/s$
• B. $5m/s$
• C. $9.8m/s$
• D. $4m/s$

Answer 1

The correct option is C

$9.8m/s$

Any body in free fall is under acceleration due to gravity,$g$ and thus accelerates at $9.8m{s}^{-2}$.

Using equation of motion:

$v=u+at$, where $u=0,a=9.8m{s}^{-2}$ and $t=1s$, we get

$v=9.8\times 1=9.8m{s}^{-1}$

Thus, it will have a velocity of $9.8m{s}^{-1}$ in the downward direction.