1. The problem statement, all variables and given/known data 2 spaceships traveling in opposite directions pass one another at a relative speed of 1.25x18^8 m/s. The clock on one spaceship records a time duration of 9.1x10^-8 seconds for it to pass from the front end to the tail end of the other ship. What is the length of the second ship as measured from its own rest frame? 2. Relevant equations lorentz transformations 3. The attempt at a solution Okay so I am guessing that the second ship, as measured from its rest frame should be smaller that measured from the frame of the other ship. I used the basic equation v=x/t and plugged in my relative speed of 1.25x10^8 m/s and my time 9.1x10^-8 s. I got 11.38 m as the length measured by the first ship. Then I used the lorentz transformation for length and found the length of the second ship to be 10.34 m.