Question

Can someone please answer this?

Answer 1

As we know
F = Mass × acceleration
also

$acceleratio = \frac{v - u}{t}$

and V = 1200
U = 0
and T = 1
then
$a = \frac{1200 - 0}{1} \\ a = 1200 \frac{m}{ {s}^{2} }$
And mass = 0.04 Kg
then
By using the equation of Force

144 = n × 0.04 × 1200
144 = n × 48
then
$n = \frac{144}{48} \\ = 3$

hence answer = 3 bullet per second
Answer = $\fbox{Option\:D}$
Hope it helps