Two spaceships, each 100 m long in its own rest frame, approach Earth from opposite directions, with equal speeds relative to Earth. As measured by a passenger in one of the spaceships, the other
Spaceship is 96 m long. What is the speed of the spaceships relative to Earth?
A) c/4
B) c/6
C) c/3
D) c/5
E) c/7

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The Answer of Two spaceships, each 100 m long in its own rest frame, approach Earth from opposite directions, with equal speeds relative to Earth. As measured by a passenger in one of the spaceships, the other
Spaceship is 96 m long. What is the speed of the spaceships relative to Earth?
A) c/4
B) c/6
C) c/3
D) c/5
E) c/7

Two Spaceships, Each 100 M Long in Its Own Rest