1. Science
2. Physics
3. an observer at rest on the earth observes two spacecraft...

# Question: an observer at rest on the earth observes two spacecraft...

###### Question details

An observer at rest on the Earth observes two spacecraft moving toward one another. Spacecraft 1 travels to the right at a velocity of 0.71 c relative to the observer. Spacecraft 2 travels to the left at a velocity of 0.71 c relative to the observer. What is the velocity of Spacecraft 1 relative to Spacecraft 2 (give your answer in terms of “c”)? Make sure that you draw a diagram and that you label S, S’, ux, ux’, and v. Also, remember that velocity is a vector.