1. A 6 kg object oscillates back and forth at the end of a spring whose spring constant is 76 N/m, an observer traveling at a speed 1.90 x 10^8 m/s relative to the fixed end of the spring. What does this observer measure for this period of oscillation?
2. A carpenter on a space station has constructed a 30.0 degree ramp. a rocket moves past the station with a relative speed of 0.841 c in a direction parallel to side x0. What does a person aboard measure for the angle of the ramp?
3. What speed is the magnitude of the relativistic momentum of a particle four times the magnitude of the nonrelativistic momentum?