You and Al are both floating freely in your spaceships. Suppose Al is moving away from you at 85 km/hr. You throw a ball in his direction at a speed of 75 km/hr. According to Al, which of the following is going on?
A) He agrees that he is moving at 85 km/hr and the ball is moving at 75 km/hr while you are standing still.
B) He sees you moving away from him at 85 km/hr and the ball moving toward him at 75 km/hr.
C) He sees you moving away from him at 85 km/hr and the ball moving toward him at 10 km/hr.
D) He sees you moving away from him at 85 km/hr and the ball moving away from him at 10 km/hr.
E) He sees you moving toward him at 85 km/hr and the ball moving toward him at 75 km/hr.
D
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