Solution
= Solution
\b[Covered by the official notes:] proper time, rapidity, proper acceleration, longitudinal acceleration transformation, rapidity derivative and additivity (PDF pp. 6–7; handwritten pp. 1–2).<Symmetry and Relativity 2011 Exam Solution Notes>[PDF pp. 6–7; handwritten pp. 1–2: proper time, rapidity, proper acceleration, longitudinal acceleration transformation, rapidity derivative and additivity]{ref}