Random

[Pusher]

That rednecking video has me thinking now

 

[redneck joe]

 

[redneck joe]

 

[redneck joe]

 

[brian4321]

I have a question... If a plane was travelling 2000 feet per second, and someone fired a bullet out of the back of the plane at 2000 feet per second, would the bullet fall straight to the ground?

 

[Grub54891]

I have a question... If a plane was travelling 2000 feet per second, and someone fired a bullet out of the back of the plane at 2000 feet per second, would the bullet fall straight to the ground?

No, it would leave the gun at 2000 fps.

​If you are in the plane, waling forward, are you walking fwd at 2000 fps or traveling forward in time? You boarded the plane in the back, and exit from fwd. Therefore, you exit sooner than you would have if you stayed in the rear.

 

[Pusher]

I have a question... If a plane was travelling 2000 feet per second, and someone fired a bullet out of the back of the plane at 2000 feet per second, would the bullet fall straight to the ground?

If the bullet exists the muzzle going 2000 fps then the velocity of the barrel is irrelavent unless your perspective is from the airplane instead of a stationary point in space..... Right?

Would the effect of the bullet's forward motion (or rather backward motion in this case) have any impact on the bullets exit speed?

Clearly, I don't know physics

 

[StarTed]

Brian4321 you are correct. The gun moving backwards at 2000 fps moves the bullet forward at 2000 fps making a resultant from outside equal to 0. From the gun's perspective the bullet is moving at 2000 fps. You are delving into the theory of relativity here.

A similar question is if an apple falls from an overhead in a train and lands on a person 5' below how far did the apple fall? From the person.s perspective the apple fell 5'. From someone outside looking at this happen the apple may have fallen much further depending upon the speed of the train. The vertical component is still 5' but now there is a horizontal component.

I hope this helps explain the question.

 

[brian4321]

This is a favorite discussion with my buddies... Another way to picture it is, if a guy was to throw a baseball out the back of a pickup that is going 40 MPH, he would have to throw the ball at least 40 MPH for it to land at the spot the pickup was at when he threw it, right?

 

[brian4321]

In my little mind, 2000 fps of muzzle velocity minus the 2000 fps that the muzzle is travelling backwards = 0.... The bullet would still leave the muzzle at 2000 fps, but it would stay in the same spot horizontally...lol

 

[StarTed]

When I was in the AF I worked on air to air missile guidance. Our little missiles could accelerate to mach 1.5 in just a few seconds. If the airplane was travelling at mach 1 and fired the missile the missile would accelerate to mach 1.5 for a total of mach 2.5 ground speed. To my knowledge our airplanes never flew backwards so subtraction was never an issue. :joyous:

 

[brian4321]

When I was in the AF I worked on air to air missile guidance. Our little missiles could accelerate to mach 1.5 in just a few seconds. If the airplane was travelling at mach 1 and fired the missile the missile would accelerate to mach 1.5 for a total of mach 2.5 ground speed. To my knowledge our airplanes never flew backwards so subtraction was never an issue. :joyous:

So what it all boils down to is, if you're in a plane and you're being attacked from behind, you want to make sure your projectile velocity is lots faster than the forward airspeed of your aircraft

 

[brian4321]

Redneck joe , if we're derailing your topic too far just say so

 

[gm280]

According to Einstein's Theory of Relativity, you can't travel faster then the speed of light. But here is an idea to ponder. If you could travel at a little over half the speed of light going in one direction, and some else is traveling at a little over half the speed of light going in the opposite direction, the relative speed between the two is over the speed of light. So viewing things from that perspective, I say you can travel faster then the speed of light...relativity wise. :noidea:

 

[Pusher]

Technically, the bullet isn't moving at all then, rather the gun is moving away from the bullet?

 

[Grub54891]

Technically, the bullet isn't moving at all then, rather the gun is moving away from the bullet?

​So if the bullet remained stationary, and there was another plane flying behind the 1st plane at the same speed, would the impact have the same force as a normal bullet?

 

[64osby]

I recall Bugs Bunny stepping off the airplane just before it crashes.

 

[StarTed]

gm280 I say you'd collide before you saw the other. Then there'd be a burst of light travelling in all directions at the speed of light.

Which way would the ashes go?

 

[Pusher]

Might be more of a vapor StarTed ;-)

Perhaps that's when the dark hole opens that captain Janeway and her crew traveled (errr... travel) through.

 

[redneck joe]

Redneck joe , if we're derailing your topic too far just say so

Never, anthing of mine in dockside is fair game but dam boys too early to read this coulda waited a day.....