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12 February, 01:56

A spaceship is moving in a straight line away from Earth at 0.80c, measured relative to Earth. It launches a missile that moves away from the spaceship in the forward direction at 0.60c, relative to the ship. Relative to Earth, what is the speed of this missile?

A. c

B. greater than c but less than 1.4c

C. 1.4 c

D. greater than 0.80c but less than c

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Answers (1)
  1. 12 February, 02:10
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    Answer: c - 1.4 c

    Explanation:

    Velocity of the space ship v = 0.80 c velocity of the missile v ' = 0.60 c

    then the velocity of the missile measured by observer is v + v'

    0.80c + 0.6c = 1.4c
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