Do Bullets Fired Upwards Pose a Risk When They Return to Earth?

  • Thread starter latentcorpse
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In summary, the conversation discusses the concern of bullets being fired vertically into the air and potentially causing harm when they fall back down. There have been recorded incidents of injuries and deaths from celebratory gunfire, with bullets reaching terminal velocity before hitting someone. Wikipedia has an entry on celebratory gunfire for more information.
  • #1
latentcorpse
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Apologies if this is the wrong forum but it's certainly a physics question I've been wondering about:

I've been watching all this Libya stuff unravel on the news and can't help but notice all these guys firing their AK47s vertically upwards. Surely that bullet should then return to Earth at the same speed as it left the gun at (minus air resistance effects obviously)? Obviously it owuld be difficult to fire it exactly 90 degrees to the surface of the Earth so that it came back down and hit you on the head but surely it must be possible that it could go up and come back down and land relatively close by?

So my question is, why does this not happen? Why do people not die from these returning bullets? Do they break up in the atmosphere or something?

Thanks.
 
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  • #4
They'd be going at terminal velocity before they hit someone - of course, bullets are specifically designed to have low air resistance and so would have a very high terminal velocity.
 
  • #5

1. How does a bullet fired from a gun travel through the air?

When a bullet is fired from a gun, it is propelled by the rapidly expanding gases from the gunpowder igniting. This creates a force that pushes the bullet through the barrel of the gun and into the air at a high speed.

2. What factors affect the speed and trajectory of a bullet fired from a gun?

The speed and trajectory of a bullet fired from a gun can be affected by several factors, including the type and amount of gunpowder used, the shape and weight of the bullet, and the angle at which the gun is fired.

3. How far can a bullet fired from a gun travel?

The distance a bullet can travel depends on the type of gun, the type of bullet, and the angle at which it is fired. On average, a bullet fired from a handgun can travel up to 1.5 miles, while a bullet fired from a rifle can travel up to 3 miles.

4. What happens to a bullet fired from a gun when it hits an object?

When a bullet hits an object, it transfers its kinetic energy to the object, causing damage or penetration depending on the strength of the object. The bullet may also fragment or deform upon impact, depending on its composition and the material of the object it hits.

5. Can a bullet fired from a gun change direction mid-flight?

Once a bullet is fired from a gun, it follows a predictable trajectory and cannot change direction mid-flight. However, external factors such as wind, gravity, and air resistance can affect its path and cause it to deviate from its intended target.

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