The average recoil force on the machine gun is determined as 27 N.
(the options provided are wrong).
How to calculate the average recoil force?
The average recoil force on the machine gun is calculated as follows;
F = mv/t
F = (m/t) v
where;
- m/t is the mass rate of the bullets
- v is the speed of the bullets
The total mass rate of the bullets is calculated as;
m/t = 150 bullets / min x 0.012 kg x 1 min / 60 s
m/t = (150 x 0.012 kg ) / (60 s)
m/t = 0.03 kg/s
The average recoil force on the machine gun is calculated as;
F = (m/t) x v
F = (0.03 kg / s) x 900 m/s
F = 27 N
Note: the options provided are wrong.