Introduction to Classical Mechanics · Problem 11.36

Relativity (Kinematics) — Morin

Physics — Mechanics · triplets

Problem

Triplet

A

stays on the earth. Triplet

B

travels at speed

4c/5

to a planet (a distance

L

away) and back. Triplet

C

travels out to the planet at speed

3c/4

, and then returns at the necessary speed to arrive back exactly when

B

does. How much does each triplet age during this process? Who is youngest?