- #1

- 257

- 4

http://en.wikipedia.org/wiki/Relative_velocity

and in there B is the observer or A is the observer

Thanks

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter Quarlep
- Start date

- #1

- 257

- 4

http://en.wikipedia.org/wiki/Relative_velocity

and in there B is the observer or A is the observer

Thanks

- #2

- 240

- 6

http://en.wikipedia.org/wiki/Relative_velocity

and in there B is the observer or A is the observer

Thanks

With respect to the general case of velocity addition in the wiki, there appears to be a (typo) in the formula.

I see two vectors (velocity A and velocity B) side by side in the denominator of the fraction. Most likely this is a dot product but there is no dot between them.

Yes? No?

- #3

PeterDonis

Mentor

- 37,737

- 15,484

in there B is the observer or A is the observer

##\vec{v}_{BA}## is the velocity of B in the rest frame of A, which needs to be calculated; ##\vec{v}_A## and ##\vec{v}_B## are the velocities of A and B in some other frame, which are presumed to be known at the start of the calculation.

Most likely this is a dot product

Yes, there should be a dot between them.

Share: