A machine gun fires $25-$g bullets at the rate of $4$ bullets per second.$$ The bullets leave the gun at a speed of $1000$ m$/$s$.$ What is the average recoil force experienced by the machine gun?

Hint: initial velocity of bullet is zero;$$ Final velocity of bullet is $1000$ m$/$s$.$

Four$$bullets per second means average time per bullet is $$t $=0\mathrm{.}25$ s$.$ Use formula relating impulse $($that the gun applies to each bullet$)$ to momentum change $($of each bullet$).$ Remember also to express $25$g in SI unit.

A$.$

$100$ N

B$.$

$20$ N

C$.$

$10$ N

D$.$

$200$ N