# Homework Help: Special relativity concept question

1. Sep 28, 2011

### squishy-fish

1. The problem statement, all variables and given/known data

gammav is a reasonable measure of the size of relativistic effects. Roughly speaking, at what speed would observations deviate from classical expectations by 1%?

2. Relevant equations

gammav = 1/ [sqrt91.v2) / c2]

3. The attempt at a solution

I've honestly puzzled over this question for hours, and have gotten nowhere. Any hints would be greatly appreciated. I have no idea where to even start. I know that I need gammav to be equal to 1.01 for it to be 1% different from classical physics. . .
However I'm not sure where to go from here.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Sep 28, 2011

### Staff: Mentor

Why not set up an equation expressing this and then solve for v?

3. Sep 28, 2011

### squishy-fish

so 1.01 = 1/ [sqrt(1 - v2) / c2]
But now I have 2 unknowns..c and v right? So how do I isolate just v?

4. Sep 28, 2011

### Staff: Mentor

c is not an unknown, it's the speed of light! Your answer for v will be in terms of c. Just solve for v like you normally would.