Speed of Spaceship - Modern Physics - Exam Paper, Exams of Physics

Download Speed of Spaceship - Modern Physics - Exam Paper and more Exams Physics in PDF only on Docsity! Test 1 Physics 342, Fall 2005 Name: ___________________________________ I.D. # ______________________________ 1. A spaceship is observed from the Earth to be moving toward a star at a speed of 0.80 c. If the distance from the spaceship to the star is 1.6 ly as measured from earth, how much time passes on the space ship while traveling to the star? 2. Spaceships A and B are moving in the same direction along the same straight line. Spaceship A is moving at 0.80 c relative to a stationary observer, and spaceship B is moving at 0.80 c relative to spaceship A. What does the stationary observer find for the speed of spaceship B? 3. O sees a red flash at his origin at t = 0 and a blue flash at x= 3.26 km at t = 7.63 μs. What are the distance and time interval between these events seen by O’ who moves relative to O in the +x direction at 0.625c? 4. What is the magnitude of the momentum of a proton moving at 0.95 c? (mp = 1.67 x 10-27 kg) 5. How fast is a particle moving if its kinetic energy is equal to its rest energy?