124 réponses à ce sujet

[Raezaiel]

Now I know this is scifi but I was thinking. In Mass Effect, the guns lower the mass of a moving object and this raises its velocity. Its kinetic energy doesn't change however because as you lower its mass its velocity increases proportionally (the whole point of lowering mass), thus the end result would be like hitting things with a molecule of oxygen or a very fast pea.

That huge mass cannon that killed the reaper makes no sense. Lowering your mass is great for getting around, but you just don't gain any kinetic energy. If anything you lower your kinetic energy.

[FoxGhost]

theory: while in the gun the projectiles mass is lowered allowing for faster acceleration, as soon as it leaves the gun, however, you loose the mass effect field and the slug retains its original mass as well as velocity in space, for small arms there will be a drag effect over long distances by atmosphere and gravity. the weapon that killed the derelict reaper was unique, this theory does not hold for it, but it was an advanced weapon usable only once.

Modifié par FoxGhost, 02 février 2010 - 08:03 .

[Chained_Creator]

Small-scale weapons have frangible (Or the 22nd century equivalent thereof.) ammunition. It hits the target and "splats", basically. Spreads out and causes massive damage. (Like modern day weapons but at MUCH higher velocities.)

Same is true for the larger weapons.

See: "Sir Issac Newton is the deadliest son of a **** in space."

"This, recruits, is a 20 kil ferrous slug. Feel the weight. Every five seconds, the main gun on an Everest class dreadnought accelerates one of these to 1.3% of light speed."

20 kilo slug hit the target and spreads out like a mass of jelly...moving at 1.3% of light speed and significantly harder than jelly.

Modifié par Chained_Creator, 02 février 2010 - 08:09 .

[Raezaiel]

uh as soon as the mass returns to the object it loses its velocity. Doesn't matter how fast its going at low mass, it retains its kinetic energy.

[WrexShepard]

Raezaiel wrote...

uh as soon as the mass returns to the object it loses its velocity. Doesn't matter how fast its going at low mass, it retains its kinetic energy.

Not how it works in Mass Effect, sorry.

[Raezaiel]

i guess inelastic collisions don't work either

[aaniadyen]

It's a game *shrugs* Don't try to take it too seriously. It's more enjoyable that way. It wasn't written with physics in mind. As far as I'm concerned, they tried to explain it, and they got something off that could potentially make sense. That is further than most Sci-fi universes go, so I'd just let it slide.

[theendcat]

I got the feeling that somehow using a mass effect lowered mass for velocity purposes but still kept its original mass for the purposes of momentum etc. Which breaks pretty much every conversation law in the book but hey, not exactly the first time.

[boardnfool86]

Raezaiel wrote...

i guess inelastic collisions don't work either

ok Bill Nye

[Blindman25]

Assuming that kinetic energy is conserved as the projectile exits the mass effect field, a 100x increase in mass only results in a 10x reduction in speed, since kinetic energy is a function of the square of the velocity. Kinetic is energy is equal to one-half mass times the velocity squared. Therefore, V(after) = V(before) x square(mass(before) / mass(after)).



Momentum would be a different story.

[raven2510]

Raezaiel wrote...

uh as soon as the mass returns to the object it loses its velocity. Doesn't matter how fast its going at low mass, it retains its kinetic energy.

not in space pal.  little to no gravity.  no friction.  its basic laws of motion.

[Jigero]

Actually they gain the mass back when they leave the gun, the gun does not maintain constant mass effect feild around the projectile, The gun lowers the projectiles mass then fires it off as soon as it leave the mass effect envelope with in the chamber, Mass effect is no longer in effect and the bullets mass comes back to it, but it's already moving so fast it doesn't lose much on it's trajectory. Basically it's like hitting a hockey puck on and ice, it moves easily on the ice but once it hits the grass it slows down, but still retained the energy from the ice

Modifié par Jigero, 02 février 2010 - 10:44 .

[BillyTheRatKing]

it's called science-fiction for a reason...

[aaniadyen]

raven2510 wrote...

Raezaiel wrote...

uh as soon as the mass returns to the object it loses its velocity. Doesn't matter how fast its going at low mass, it retains its kinetic energy.

not in space pal.  little to no gravity.  no friction.  its basic laws of motion.

This might be true...but what about fighting inside the atmosphere of a planet? On ships?

[Maxiric]

There is no way to scientifically guess what happens if you could somehow subtract mass from something then add force then add the mass back. Also a Wizard did it.

[ArcanistLibram]

Unless I heard completely wrong, it's not a mass effect gun. It's a mass accelerator.

[raven2510]

aaniadyen wrote...

raven2510 wrote...

Raezaiel wrote...

uh as soon as the mass returns to the object it loses its velocity. Doesn't matter how fast its going at low mass, it retains its kinetic energy.

not in space pal.  little to no gravity.  no friction.  its basic laws of motion.

This might be true...but what about fighting inside the atmosphere of a planet? On ships?

its only gonna travel 100-900 yards.  Its still gonna be moving at hyper-velocity.  remember...its still the same size as a human bullet.  its the same basic concept, minus the gunpowder.

[Raezaiel]

ArcanistLibram wrote...

Unless I heard completely wrong, it's not a mass effect gun. It's a mass accelerator.

well if it just accelerates things I can do that with my hand. I was just thinking that its the same concept as their space travel, lower the mass to make the velocity faster because the system retains its total energy. Works great and amazing for getting to where you want to go, not so much for blowing things up because your kinetic energy isn't changed. Hitting things with bullets works because of the kinetic energy imparted on the mass during acceleation in the gun barrel all hits a small point at once. if the bullet weighs as much as a neutrino but is going th speed of light nothing much will happen.

[Guaritor]

I think the idea is that it takes less energy to accelerate an almost mass-less particle to extreme speeds then it does an average bullet. So the gun accelerates the particle to huge speeds with very little energy, and when the mass returns it may slow down (to conserve momentum), but it will be still moving very fast for the relatively low amount of energy involved in propelling it.

... maybe?  Bah, im too tired to think about physics, and that class was so long ago.

Or... were all wrong and it works the same way normandy's stealth propulsion system works... in that the gun creates small gravity wells using the mass effect in front of the bullet drawing it forward with no recoil on the gun.

Modifié par Guaritor, 02 février 2010 - 11:34 .

[xMister Vx]

Isn't it all the same thing as a railgun? There are working prototypes. I thought BioWare just added the words "mass effect" to this because... it has to be everywhere.



Also, how does using a mass effect field create a nuclear explosion?.. I think it's best not to think about it too long.

[Lukertin]

FoxGhost wrote...

theory: while in the gun the projectiles mass is lowered allowing for faster acceleration, as soon as it leaves the gun, however, you loose the mass effect field and the slug retains its original mass as well as velocity in space, for small arms there will be a drag effect over long distances by atmosphere and gravity. the weapon that killed the derelict reaper was unique, this theory does not hold for it, but it was an advanced weapon usable only once.

No.  This violates the conservation of momentum.

[KBGeller]

Because it is likely modelled after the real/fictional rail guns

[Chris2112534566]

Chained_Creator wrote...

Small-scale weapons have frangible (Or the 22nd century equivalent thereof.) ammunition. It hits the target and "splats", basically. Spreads out and causes massive damage. (Like modern day weapons but at MUCH higher velocities.)

Same is true for the larger weapons.

See: "Sir Issac Newton is the deadliest son of a **** in space."

"This, recruits, is a 20 kil ferrous slug. Feel the weight. Every five seconds, the main gun on an Everest class dreadnought accelerates one of these to 1.3% of light speed."

20 kilo slug hit the target and spreads out like a mass of jelly...moving at 1.3% of light speed and significantly harder than jelly.

hell even if you shot actual Jelly out at that speed it would be equivilent to a nuke goin off

[serjwolf]

boardnfool86 wrote...

Raezaiel wrote...

i guess inelastic collisions don't work either

ok Bill Nye

[Myrmedus]

This entirely depends on the way in which the bullet regains its normal mass once it exits the mass effect field.



If the bullet regains mass from its own kinetic energy then you're right, it will make no difference apart from making the bullet reach its target quicker (great for Sniper Rifles ^^). However, if the bullet regains mass by 'syphoning' energy from around it when it reverts back then it results in an overall increase in the projectile's kinetic energy as it's gaining mass from outside its own energy reserves.



In addition I'm pretty sure, like someone else said in here, that it was a mass accelerator weapon not mass effect weapon.