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. .