Physics question:relativity

Physics
Tutor: None Selected Time limit: 1 Day

A space ship traveling east flies directly over the head of an inertial observer who is at rest on the earth's surface. The speed of the space ship can be found from this relationship: .
Reference: Ref 28-5

The pilot fires an ion gun that propels ions from the space ship at 1.0 × 108 m/s relative to the ship. What is the speed of the ions as measured by the earth observer?
Question 10 options:
Jul 9th, 2015

Thank you for the opportunity to help you with your question!

Need to know the speed of the spaceship,

 the answer is 1) 3) or 5)  

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jul 9th, 2015

This is all of the information given in the question, I asked my teacher and he gave me the hint to use this: .  can you see how this factors in?

Jul 9th, 2015

yes, the speed is 

v= sqrt(3)/2 c 

so use Lorentz formula 

V = (sqrt(3)/2c + 1/3c)/(1+sqrt(3)/2*1/3) = 2.8 x10^8 m/s       

Jul 9th, 2015

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Jul 9th, 2015
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