# How do I calculate velocity of an object if I know its Lorentz factor?

The question I have for my physics homework is "What does the velocity of an object need to be if it's Lorentz factor is 2?"
I know the equation for the Lorentz factor is γ = 1/sq(1-(v^2/c^2)) I just don't know how to get the velocity out of it.
I'm a bit of a math and physics noob so that might bit a slight problem aswell! :P Any help is appreciated!

You need to rearrange the equation, you know γ is 2 and c is the speed of light which is constant so you can find v which is the velocity of the object.

It is pretty simple algebra, have you attempted to try? Possibly show some work and we can be of more help.

Evo
Mentor
The question I have for my physics homework is "What does the velocity of an object need to be if it's Lorentz factor is 2?"
I know the equation for the Lorentz factor is γ = 1/sq(1-(v^2/c^2)) I just don't know how to get the velocity out of it.
I'm a bit of a math and physics noob so that might bit a slight problem aswell! :P Any help is appreciated!
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Thank you.