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

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

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

4. 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

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. 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 m/sec.
Imagine 2 passing rockets each traveling this fast.
What is their relative speed to one another?

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