Phys320 – Spring 2004 (Baski)
x
y
S = earth
u
x
= 0.9c
S’
v = 0.99c
x
y
S
v = 0.75c
S’
L’ = 13m
x’ = 12m
y’ = 5m
Quiz #7:
Relativity
April 28, 2004
Name: ___SOLUTIONS
_____
Complete both of the following problems.
Show all of your work for full credit.
2
22
1
Usefulformulas:
and
1
1
x
x
uv
uvc
vc
g

==


x'
u
Problem 1:
Lorentz Transformation (velocities)
You are speeding away from a patrol spaceship, where your speed is 99% the speed of light and the patrol
ship is only traveling at 90% the speed of light according to someone on earth. What speed does the patrol
spaceship appear to be traveling according your reference frame?
Let frame S be the rest frame of the Earth and frame S’ be your spaceship
moving at speed
v
to the right relative to the Earth.
The patrol spaceship is then an object moving at speed
u
in the S frame.
Now, find the speed
u’
of the patrol spaceship in your S’ frame.
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This homework help was uploaded on 04/22/2008 for the course PHYS 320 taught by Professor Baski during the Spring '04 term at VCU.
 Spring '04
 Baski
 Physics, Work

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