A pointless thread

[jon rock]

So you just had to look. I told you it was pointless.

ok hows about a michael jackson joke

What time does micheal jackson go to bed?
when the big hand touches the little hand.

[BOUNCER]

Your about 50 yrs too late. This has been flogged to death.

[samoth]

Since you are all so bored and making pointless threads and what not, someone should PM me to help me with a relativity problem I'm having trouble figuring out.

Not that I'm going to keep my hopes up or anything, as when I usually mention the word 'physics', whatever thread I'm on dies.

So how about them Packers? Griffey get to 500 yet?

[monstercojones]

whats the physics problem?

[ChiTownTommy]

packer suck,
you know why they saw michle jackson at k-mart?
he heard about the sale, litttle boys underwear half off

[samoth]

whats the physics problem?

Special Relativity

Relativistic speed of light derived from Newtons second law.

In classical physics, force is given by
F=dp/dt
where p=mv
so
F=d/dt (mv)
=m dv/dt
=ma

So using F=m dv/dt
rearranging
(F/m) dt=dv
dv=a dt
integrating
int dv=int a dt
v=a int dt
v=at

Where a=F/m is the slope of the line (linear) on a t vs v graph. However, this is wrong, as the line should asymptotically approach a limit of c.

The problem is that p=mv is wrong in relativistic terms. Relativistically, p=(gamma)mv

So F=dp/dt
=d/dt ((gamma)mv)

BUUUUUT (gamma) depends on v........ so taking the derivative will act on (gamma) which DEPENDS on v.

I am trying to come up with a (rather complex) integral using substitutions and exponentials to show the actual speed of light barrier which can be reduced to non-relativistic terms when v approaches zero and gamma approaches 1 giving F=(1)ma=ma

This problem also deals with imaginary numbers, as the example given was the speed of 2c.

Classically, this gives (gamma)=(1-(v^2/c^2))^(1/2)=(1-4)^(1/2)=1/3i where i=(-1)^(1/2)

My problem is that I really don't know where to even start.
I'm thinking I need to use the non-classical definition of momentum p, but where and how?

[hey, you asked ]

[samoth]

After typing all of that out, I dang well better get some replies. I really don't care what the replies are about, but I better see some here real quick-like.

[bornbad71]

[shaking in my shoes]......... was up with all the chicken scratch????????????

[bornbad71]

[shaking in my shoes]......... was up with all the chicken scratch????????????

This was a pointless post in a pointless thread.

[samoth]

This was a pointless post in a pointless thread.

You're daaaaaaaaammnn right it was.

Now how about a solution to the problem, huh? I'll be up all night, so if it takes you a while, I'll still be here.

[Cycleon]

well at least we both agree that neither of us would know where to start on that

[spywizard]

silly rabbits...........

just keeping the insanity going..........