Radius of the Earth proves spherical

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MooBs

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Re: Radius of the Earth proves spherical
« Reply #90 on: March 12, 2007, 12:59:36 PM »
It sure looks like a series of divisions.  It is not obviously a fraction.  Math is precise.

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Tobias

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Re: Radius of the Earth proves spherical
« Reply #91 on: March 12, 2007, 01:08:05 PM »
yeah ok i will submit i made a mistake i was reading it as a series of fractions and thats how i wrote the 5.0/0.25 as i say i now accept you are right and your maths work!

TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #92 on: March 12, 2007, 01:09:17 PM »
i now accept you are right and your maths work!
Of course they work.

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Tobias

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Re: Radius of the Earth proves spherical
« Reply #93 on: March 12, 2007, 01:15:14 PM »
No, it's:

Quote
w = (u+v)/(1+u*v/c^2)

ok having all of this down common sence tells me that if you drop an object accelerating at 9.81m/s^2 and leave it for 1 second it will be moving at 9.81m/s.  so 0+9.81=9.81 9.81/(1+0)=9.81 9.81/300000000=3.27*10^-8 still not 9.81m/s maybe im still miss understanding

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Re: Radius of the Earth proves spherical
« Reply #94 on: March 12, 2007, 01:18:55 PM »
ok having all of this down common sence tells me that if you drop an object accelerating at 9.81m/s^2 and leave it for 1 second it will be moving at 9.81m/s.  so 0+9.81=9.81 9.81/(1+0)=9.81 9.81/300000000=3.27*10^-8 still not 9.81m/s maybe im still miss understanding
Good Lord!

w = (0 + 9.81)/(1+0*9.81/c^2) = 9.81

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sokarul

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Re: Radius of the Earth proves spherical
« Reply #95 on: March 12, 2007, 01:26:26 PM »
ok having all of this down common sence tells me that if you drop an object accelerating at 9.81m/s^2 and leave it for 1 second it will be moving at 9.81m/s.  so 0+9.81=9.81 9.81/(1+0)=9.81 9.81/300000000=3.27*10^-8 still not 9.81m/s maybe im still miss understanding
Good Lord!

w = (0 + 9.81)/(1+0*9.81/c^2) = 9.81

Since when did they use the relativistic velocity addition formula for 9.8ms/s?
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TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #96 on: March 12, 2007, 01:30:06 PM »
What?

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Re: Radius of the Earth proves spherical
« Reply #97 on: March 12, 2007, 01:33:21 PM »

Since when did they use the relativistic velocity addition formula for 9.8ms/s?
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TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #98 on: March 12, 2007, 01:36:25 PM »

Since when did they use the relativistic velocity addition formula for 9.8ms/s?
9.8ms/s?  Is that milliseconds/second?  Do you mean m/s^2?  What about 9.8?

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Re: Radius of the Earth proves spherical
« Reply #99 on: March 12, 2007, 01:40:11 PM »

Since when did they use the relativistic velocity addition formula for 9.8ms/s?
9.8ms/s?  Is that milliseconds/second?  Do you mean m/s^2?  What about 9.8?
O wow I missed that.

But anyway, who uses the velocity addition formula for such slow speeds.  Let alone accelerations
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TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #100 on: March 12, 2007, 01:43:33 PM »

But anyway, who uses the velocity addition formula for such slow speeds.  Let alone accelerations
Well if you want to be accurate, you had better use it.  If your speeds get rather high, then you better start using it.

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Re: Radius of the Earth proves spherical
« Reply #101 on: March 12, 2007, 01:47:31 PM »

But anyway, who uses the velocity addition formula for such slow speeds.  Let alone accelerations
Well if you want to be accurate, you had better use it.  If your speeds get rather high, then you better start using it.

Ok please use that equation for values A and B where A = 9.8m/s/s and B= 10m/s/s.  Also what value for C will you use, because I dont know the acceleration of light value.
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TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #102 on: March 12, 2007, 01:56:15 PM »
Ok please use that equation for values A and B where A = 9.8m/s/s and B= 10m/s/s.  Also what value for C will you use, because I dont know the acceleration of light value.
Obviously you've never taken a class in Relativity.  Acceleration is absolute.  The equation I provided is for velocity addition.

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Tobias

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Re: Radius of the Earth proves spherical
« Reply #103 on: March 12, 2007, 02:00:04 PM »
ok having all of this down common sence tells me that if you drop an object accelerating at 9.81m/s^2 and leave it for 1 second it will be moving at 9.81m/s.  so 0+9.81=9.81 9.81/(1+0)=9.81 9.81/300000000=3.27*10^-8 still not 9.81m/s maybe im still miss understanding
Good Lord!

w = (0 + 9.81)/(1+0*9.81/c^2) = 9.81

did i do it wrong again with the series of divisions as u said it was cause the answer does not come out as 9.8! i have only just seen this equation but it doesnt work for the gravitational accelration u are suggesting maybe u need to learn relativity

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Re: Radius of the Earth proves spherical
« Reply #104 on: March 12, 2007, 02:07:19 PM »
Ok please use that equation for values A and B where A = 9.8m/s/s and B= 10m/s/s.  Also what value for C will you use, because I dont know the acceleration of light value.
Obviously you've never taken a class in Relativity.  Acceleration is absolute.  The equation I provided is for velocity addition.
I called it the velocity addition formula.

I called it the velocity addition formula.

You guys were using 9.81m/s/s, I missed the part where he took of the acceleration part to just make 9.8m/s.  SO it looked like you were using it for acceleration.   But either way there is no reason to use that formula at such slow speeds.  It will be accurate just adding them together.

I have take physics that covers the relativistic equations.
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Re: Radius of the Earth proves spherical
« Reply #105 on: March 12, 2007, 02:08:26 PM »
did i do it wrong again with the series of divisions as u said it was cause the answer does not come out as 9.8! i have only just seen this equation but it doesnt work for the gravitational accelration u are suggesting maybe u need to learn relativity
There is no way you are in college.  If you are, you must be no further than basic algebra.

Look:

w = (u + v) / (1 + u*v/ c^2)

Let's take this slowly.

u = 0.  This is our current velocity, and we are starting at rest.
v = 9.8m/s.  This is our additional velocity, due to accelerating at 9.8 m/s^2 for 1 second.

Now, (u + v) = (0 + 9.8 ) = 9.8.

(1 + u*v/c^2) = (1 + 0*9.8/c^2) = (1 + 0) = 1.

Therefore, w = 9.8/1 = 9.8.
« Last Edit: March 12, 2007, 02:10:10 PM by TheEngineer »

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TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #106 on: March 12, 2007, 02:09:51 PM »
But either way there is no reason to use that formula at such slow speeds.  It will be accurate just adding them together.
But you can't just add them together at relativistic velocities.

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sokarul

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Re: Radius of the Earth proves spherical
« Reply #107 on: March 12, 2007, 02:13:42 PM »
But either way there is no reason to use that formula at such slow speeds.  It will be accurate just adding them together.
But you can't just add them together at relativistic velocities.
Which is why I said
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Since when did they use the relativistic velocity addition formula for 9.8ms/s?
I ment that 9.8 is such a slow speed. I didnt catch the acceleration part till later.  There is no reason to use it at 9.8m/s.
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TheEngineer

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Re: Radius of the Earth proves spherical
« Reply #108 on: March 12, 2007, 02:15:27 PM »
Yes, I got that.  You don't have to use it at slow speeds.  However, you must use it when velocities become fractions of c.

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Kasroa Is Gone

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Re: Radius of the Earth proves spherical
« Reply #109 on: March 12, 2007, 03:15:57 PM »
Ok please use that equation for values A and B where A = 9.8m/s/s and B= 10m/s/s.  Also what value for C will you use, because I dont know the acceleration of light value.
Obviously you've never taken a class in Relativity.  Acceleration is absolute.  The equation I provided is for velocity addition.

Didn't you say acceleration was relative?

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Re: Radius of the Earth proves spherical
« Reply #110 on: March 12, 2007, 03:48:49 PM »
Acceleration is relative to varying FORs.  It is absolute in space in Special Relativity.

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Geordi la Forge

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Re: Radius of the Earth proves spherical
« Reply #111 on: March 12, 2007, 04:47:28 PM »
For those that are teh sux:

w =    u + v
1 +   uv
c^2
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johnfrusciante

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Re: Radius of the Earth proves spherical
« Reply #112 on: November 15, 2007, 09:52:26 AM »
My stopwatch doesn't have that function, and if it did I wouldn't trust it . . . because WTF?

such is the problem with you crazies.