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

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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.

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