What is the average force of pressure on the shoulder when firing from a machine gun
| September 21, 2021 | education
What is the average force of pressure on the shoulder when firing from a machine gun, if the mass of the bullet is m = 10 g and the speed of the bullet when it leaves the bore is V = 300 m / s. The machine gun makes N = 300 rounds per minute.
The impulse of the force of pressure on the shoulder when firing from a machine gun is equal to the change in the momentum:
F Δt = N m V,
where m is the mass of the bullet, m = 10 g = 0.01 kg; V – bullet velocity when leaving the bore, V = 300 m / s; N = 300 – the number of shots per time interval Δt = 1 min = 60 s.
F = N m V / Δt.
Substituting the numerical values, we find the average pressure force:
F = 300 × 0.01 × 300/60 = 15 N.
Answer: F = 15 N.
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