Relativistic Velocity Addition
Spaceships A and B travel along the x-axis. Relative to a stationary observer, spaceship A has a velocity of +0.5c and spaceship B has a velocity of -0.7c. What is the magnitude of spaceship B’s velocity as measured by an observer in spaceship A?
A
0.2c
B
1.2c
C
0.31c
D
0.89c
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