A rocket is headed away from Earth at a speed of 0.80c. The rocket fires a missile at a speed of 0.70c (the missile is aimed away from Earth and leaves the rocket at 0.70c relative to the rocket). How fast is the missile moving relative to Earth?
- (a) 1.50c;
- (b) a little less than 1.50c;
- (c) a little over c;
- (d) a little under c;
- (e) 0.75c.
EXERCISE F Return to the Chapter-Opening Question, page 951, and answer it again now. Try to explain why you may have answered differently the first time.
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