Two identical fast trains move parallel to each other
PHYSICS · Multi-part · A Level · Physics · Turning points in physics · Turning points in physics
Problem
Two identical fast trains move parallel to each other. An observer on train A tells an observer on train B that by her measurements (i.e. A's) train A is 30 m long and train B is 28 m long. The observer on train B takes measurements. Calculate what he will find for:
(1) the speed of train A with respect to train B
(2) the length of train A
(3) the length of train B.