1. Question 5 20 pts You are in a closed room (no windows and closed doors) on a ship that is
traveling very close to the speed of light. Which of the following effects would you notice while
sitting in this room? None of the above observations could be made My wristwatch seems to be
ticking more slowly. O I seem to be skinnier than usual. O My mass has increased. be taller than
usual.
Solution
As the person is travelling along with the ship at the speed of light there is no relative motion
between him and his surrounding hence none of the observations can be made.
The concept of relativistic mechanics is applied when there is a relative motion between the
observer and the quantity to be observed and than relative motion must also be comparable to
speed of light for significant observations.