1. The problem statement, all variables and given/known data As measured by an observer on earth, a spacecraft runway has a length of 3.6km. What is the length of the runway as measured by the pilot of a spacecraft flying directly over the runway at a speed 4.00 x10^7 m/s relative to the earth? 2. Relevant equations L= Lnot/γ 3. The attempt at a solution I inserted 3.6km as the Lnot and got 3351m as the answer by using the equation. L= 3600/ (1/sqrt(1-4.0E7/3.0E8)) = 3351m Is this true? Or i have confused the L as Lnot? I got the answer as i figure the pilot is in rest and the runway is moving relative to him.