Question

Jack and Jill decide to go their separate ways. Each one climbs aboard a Celestrion Mark IV spaceship (of proper length 15.7 m) and blasts off from the Earth. Observers on Earth report that Jack’s ship is traveling at a speed of 0.915 c and Jill is traveling in the exact opposite direction at a speed of 0.750c.

a) What is the length of Jack’s moving spaceship as seen by observers on Earth?

b) What is the speed of Jack’s spaceship as seen by Jill?

c) What is the length of Jill’s spaceship as seen by Jack?

Answer 1