(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two spaceships approach the Earth from opposite directions. According to an observer on the Earth, ship A is moving at a speed of .753c and ship B at a speed of .851c. What is the speed of ship A as observed from ship B? Of ship B as observed from ship A?

2. Relevant equations

v'=(v-u)/(1-u*v/c^2)

3. The attempt at a solution

For the speed of ship A with respect to B I tried

(.851c-.753c)/(1-.851c*.753c/c^2) = .2728c

For the speed of ship B with respect to A i tried

(.851c+.753c)/(1+.851c*.753c/c^2) = .9776c

I am not sure of the correct answers, However I'm pretty sure these are wrong. Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Lorentz/velocity transformation

**Physics Forums | Science Articles, Homework Help, Discussion**