A machine gun fires a bullet of mass 40 g with a velocity 1200 m/s The man holding it, can exert . a maximum force of 144 N on the gun. How many bullets can he fire per second at the most?
Solution) According to newtons 2nd law..... F=m(v-u)/t
144=0.04*n*1200/1 (per second...so t=1s)
n=3 bullets / sec