Mass Dilation (1 Viewer)

[bubu]

Never got this concept understood

if we use the example of particle accelerators to show mass dilation because particles seem to increase in mass in a particle accelerator, but the equation shows as it states that the particles at light speed should have infinite mass to a stationary object, howeva this is not possible otherwise otha particles will be attracted to its high gravity and make a black hole and everythin will collapse into those particles.

Or is it rather weight dilation, whereby the acceleration shows the particle appears to increase in weight rather than mass

Or mass dilation as in the atoms being elliptical and seems to be heavier as it has more weight ova a certain amount of area.

But the big problem is how can we measure mass dilation, cause if we measure the weight of particles in an accelerator, it has a relative speed to the stationary object and we are measurin massxvelocity rather than mass alone.

 

[serge]

it IS mass dilation, not weight dilation...
mass seems to increase to infinity as we approach the
speed of light (for a stationary observer that is)

It's a consequence of the speed of light being constant
energy is seemed to be converted into mass E=mc^2

Just read a few different definitions of it, got to
HSC online and check out how they explain it

BTW- This is the first time ive heard anything near
your explanations...

 

[serge]

Mass doesn't seem to increase, it does increase.

hmm... good point

im just not comfortable saying that cause
it only increases for a stationary observer

 

[Captain Gh3y]

Yes, you're right, if something reached the speed of light, it would have infinite mass, and that would cause some serious problems to the universe, and anyone who happened to be inside the universe at the time.

Fortunately, nothing can reach the speed of light, so the universe is safe. For now.

 

[bubu]

u mean with mass

 

[Captain Gh3y]

u mean with mass

Yep. If u look at the equation, if v = c, you have m_v = m₀/0, and obviously you can't divide a number by zero. Not possible. v is always < c.

In particle accelerators they get particles up to 90% (or was it 99%), but never the actual speed of light.

This site explains it pretty well.

 

[bubu]

except u note that alpha particles in particle accelerators are travelling 0.99c which is close to the speed of light, so by your definition, if i fire 1 high speed neutrons into space, it will have infinite mass and i can affect the rotation of the moon because it will be attracted to the neutron as it has a larger mass than the moon and hence the moon will be attracted to its gravitational field and since space is a vacuum then it wont slow down and hence i find a straight path in the universe and project it down and see wat happens.. if its true than total chaos otherwise it wont

i doubt tho.. it it could always be fun to experiment


the evil implications of physics

 

[Captain Gh3y]

Ok, well what's the mass of a resting neutron?

The HSC data sheet says 1.675x10^-27 kg, so let's use that.

Say if we've got it going at .99c and we fire it off into space, its mass relative to the "stationary" observer on earth will be...

(oh, by the way, this isn't really true, since the earth and the moon are constantly accerating, and also we have to accelerate the neutron to .99c, so this is general relativity stuff, but we'll keep going for the fun of it)

m_v = m₀/sqrt(1 - v²/c²)

so m = 1.675x10^-27 / sqrt(1-.99²)

The dilated mass would be 1.18x10^-26kg

So it's not as drastic as that

 

[Captain Gh3y]

Oh, and say we stepped up the velocity to 0.9999999999c, then the mass would be 1.18x10^-22kg, so still less than a piece of space dust.

Also, the closer you get to c, the harder it is to make it speed up more.
So let's say we got a human being with mass 10kg and cannon'd him into space at .99c, he'd weigh 502kg, or 4924.6N weight force. Still wouldn't affect the course of the moon. Once again, the amount of energy you'd need to get a whole human being (as opposed to a neutron) up to that speed would be huge.

I'd say the moon's rotation is safe.

Since I'm having fun here, say we've got the 502kg man catapulting through space, and he's, say 100km above earth, plus Earths' radius of 6 378.1 kilometers his influence on the Earth due to gravity would be

F = Gmm/r²

F = (6.67x10^-11 * 502 * 6x10²⁴)/(100000+6378000)

F = 3.1x10¹⁰N acting on both of them.

And, F = ma

3.1x10¹⁰ = 6x10²⁴ * a

a = stuff all.

Space shuttle launches would have more effect on the Moon's rotation than any particles travelling at relativistic speeds.