1. Galilean relativity invariantrelative acceleration time direction distance energy force mass momentum speed Physical laws fixed dimensions

2. Traveling on impulse power at 0.25c the Enterprise crew measure their forward beacon to be racing out ahead of them at a speed of (1)0.25c(3) 1.00c (2)0.75c(4) 1.25c

3. 5 m/sec Frame v 2 B =3 m/sec 1 kg v 1B =3 m/sec v 1 A = 1.9999999999999999999999989 m/sec v 2 A = 7.9999999999999999999999956 m/sec

4. The Borg ship is fleeing at 0.50 c. Pursuing at 0.75 c, the Enterprise fires its phasers ( intense, high energy light beams ) directly on target. Borg instruments measure the beam as racing toward them at (1)0.25c (3) 1.00c (5) 1.50c (2)0.75c (4) 1.25c (6) 1.75c

5. If we play catch, and I jogged toward you at 10 mi/hr and you tossed a softball at my direction at 40 mi/hr with what relative speed do I catch it?

6. Two supersonic jet fighters pass each other traveling 600 m/sec in opposite directions. What relative speed do they sense of one another? Escape velocity needed by a rocket is 11200 m/sec. Imagine 2 passing rockets each traveling this fast. What is their relative speed to one another?

8. (3) 1.00c The speed of light in a vacuum is an invariant for all observers of any inertial frame.