Question

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?

• A. One
• B. Four
• C. Two
• D. Three

Answer 1

Answer: (D)

Three

Answer 2

Q F = nmv

\ n = $\frac{F}{mv}$ = $\frac{144}{(40 \times 10^{- 3}) \times 1200}$ = 3