Jane moves at v = -0.3c relative to Fred.
general in this case
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Galilean transforms: x' = x - v*t = x + 0.3*t
t' = t = t
Event Fred Jane
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t= x= t'= x'=
1. Line of men
starting at x=0,
1 m apart,
raise hand at
t = 0
man at x=0 0 0
man at x=4 0 4
man at x=8 0 8
man at x=12 0 12
2. Man at x=0 has cold. 0 0
At t = 5, coughs. 5 0
At t = 10, sneezes 10 0
3. Doggie runs across
field at speed 0.2c
to left. At t=0,
doggie at x=8. 0 8
Dog barks at t=5 5 7
Dog barks at t=10 10 6
4. Bird flies to right
at 0.9c. At time t=0,
bird at x=-3. 0 -3
Bird chips at t=0.
Bird meets Dog 10 6
5. Man with cold flashes
laser to right at t=8. 8 0
It strikes flower
3 seconds later. 11 3