A Satellite Moves East, Taken as the Positive X Axis

question 18

Multiple Choice

A satellite moves east, taken as the positive x axis direction, at a speed of 0.5 c and a spaceship moves toward it (to the west) at a speed of 0.8 c as measured by an observer on the Earth. The speed of the satellite measured by an observer in the spaceship is

• A) 8.7 c
• B) 0.21 c
• C) −0.21 c
• D) 0.93 c
• E) −0.93 c

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