Question

A machine gun has a mass of 20kg at 35 grams bullet @ 400 bullet per minute weather speed of 400 metre per second what average force must be applied to keep it in position

Answer 1

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• Mass of Gun (M) = 20 kg
• Mass of Bullet (m) = 35 g = 0.035 kg
• Velocity (v) = 400 m/s

Solution

We can find number of bullets per second

Number of bullets per second = 400/60

⇒20/3 bullets per second

As,

We have to find force So,

F = n(mv)/t = 20/3 * (0.035 * 400)/1

⇒F = 20/3 * 400/1

⇒F = 20*14/3

⇒F = 280/3

⇒F = 9.33 N

∴ Force required is 9.33 N