APFIVE Relativistic Velocity Addition
Two spaceships A and B are moving away from Earth. From Earth’s reference frame, spaceship A moves at 0.6c and spaceship B moves at 0.8c in the opposite direction. According to special relativity, what is the speed of spaceship B as measured by an observer on spaceship A?
A
0.946c
B
1.4c
C
0.875c
D
0.2c
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | bryan1666369 | 0 | 1 | 0m 00s | -10 |
| #2 | an19stasia12 | 1 | 2 | 1m 47s | -17 |
| #3 | dxie26808 | 0 | 2 | 0m 00s | -20 |
| #4 | ethan.yh.cui | 0 | 1 | 1m 27s | -97 |
| #5 | aibekn386 | 1 | 4 | 5m 04s | -234 |
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