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 General Physics General Physics Help Forum Mar 21st 2019, 04:37 PM #1 Member   Join Date: Jul 2013 Posts: 63 Math for balance physics formula No start as time means it. When every unit is 1 as balance, 1m/(sec^2)=1*a. 1m/sec=1*a*t, (1*v=1*a*t). (1/2)*a*(sec^2)=s. (a*t)*t=2*s. t=2*s. 1*s=1*v*t. 2*s=2*v*t, 2*v*t=2*s. 1=1. It is for balance formula 1+1=2.   Mar 21st 2019, 05:33 PM   #2

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 Originally Posted by philipishin No start as time means it. When every unit is 1 as balance, 1m/(sec^2)=1*a. 1m/sec=1*a*t, (1*v=1*a*t). (1/2)*a*(sec^2)=s. (a*t)*t=2*s. t=2*s. 1*s=1*v*t. 2*s=2*v*t, 2*v*t=2*s. 1=1. It is for balance formula 1+1=2.
This has nothing to do with Relativity so I'm moving it to the General Physics Forum.

I'm afraid you are misusing the equal signs.

To be correct:
a has units of m/s^2. a does not equal m/s^2.
at has units of m/s, and so does v. However we can't really say that v = at by units themselves. A more general statement that v = kat + n, where k is unitless and n has units m/s is the best we can do. (And we can even do things like $\displaystyle v = at e^{-bt}$ where b has units of 1/s.)

A similar comment holds for s = vt.

Also, you went from $\displaystyle s = vt \implies 2s = 2vt \implies 1 = 1$. You are stating that 1 = 1, thus b = b, thus 1 = 1, where b = s or b = vt. You really aren't saying anything here so you can't conclude from this that 1 + 1 = 2. Now, this is obviously true, it's just that you can't make a conclusion like that from where you started. (And 1 + 1 = 2 is implicit in all of the Math you've done on the page anyway.)

-Dan
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