Speed of bullet

If I'm stood on a moving train and I fire my gun does it move at a different speed than if I were standing still?
How about if the train were accelerating?

Yes, it does.

Unless the train or the bullet or both are moving at close to the speed of light, the speed of the bullet, as measured by someone standing on the ground, will be the sum of the speed of the train (as measured from the ground) and the speed of the bullet (as measured from the train).

This is why rockets are launched from points as close as possible to the equator.  The earth rotates faster at the equator than it does near the poles, and the speed of rotation gives an extra boost to the rocket.

Also check this out:
http://www.videosift.com/video/A-Ball-Thrown-Back-100-kmh-From-A-Truck-Moving-100-kmh
A baseball pitching machine is calibrated to pitch a ball at exactly 100 kph.  Then it is loaded on the back of a truck, which is driven around a racetrack at exactly 100 kph.  When the ball is pitched from the back of the truck, the ball falls straight down.

Thank you very much.

A gun that shot guns that shot bullets would be really cool then.

OP should go back to middle school and redo science classes.

>>4

I lol'd

>>4
Forget the bullets, don't you realize the implications of this? Imagine a particle accelerator... with another particle accelerator inside. Science will never be the same.

>>3
You are very welcome.

>>5 No, I don't, I'm pretty good at science I just wanted to confirm this.

>>7
Rule breaks down at speeds approaching speed of light and small particles, and special relativity takes place, besides, how exactly do you intend to fit a particle accelerator inside a sub-atomic particle?

>>5

American schools are terrible.

>>4
No, the original bullet wouldn't have enough mass to make it that effective. Also, expense and size.

agh, I want to watch that video but it's been removed from youtube.

>>13
what he said

>>12

gtfo, captain buzzkill

>>12
Correct, they did it on Mythbusters

yes. In fact, the very same thing happens to you when you run. The earth is constantly moving, and so when you run, you increase that speed. Same thing goes for the bullet and train thing, but on an observable scale.

>>11 It's good that I didn't go to an American school.

Depends on the bullet... but 900-1100 feet per second.
The movement of the train will have little effect over the bullets impact.

A train is moving 60MPH (About 100 feet per second) + the bullet speed (900-1100 feet per second) = 1000-1200 feet per second.

The difference in power is about 18-20%.

65MPH not 60 :p

But would the decrease in the speed of the train also remain the same?

What the fuck are you talking about?

FUCK EVERY WHITE PERSON ON THIS FORUM

God fuck us, every one.

>>21
We're assuming the train to be infinitely massive/being accelerated in such a manner that its velocity does not change.

>>24
RedCream fuck us, every one.