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7. (а)
Fred stands still. He tosses a ball to the left at 0.3 c, where c is the
speed of light. Meanwhile, Jane drives her car past Fred to the left at 0.6 c. What
is the speed of the ball in Jane's frame of reference?
(b)
tosses a ball forward at a speed Of 0.3 c. What is the speed of the ball in Fred's
Fred stands still. Jane drives her car past Fred to the left at 0.6 c. She
frame of reference?

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