Galilean relativity invariant relative acceleration direction

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Presentation transcript:

Galilean relativity invariant relative acceleration direction fixed dimensions distance energy force mass momentum speed time Physical laws

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 0.25c (3) 1.00c 0.75c (4) 1.25c

Frame B 5 v1B=3 m/sec v2B=3 m/sec m/sec 1 kg 1 kg Frame A v1A= 1.9999999999999999999999989 m/sec v2A= 7.9999999999999999999999956 m/sec

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

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?

600 m/sec in opposite directions. 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?

The speed of light in a vacuum is an invariant for all observers of any inertial frame.