 #1
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 4
Homework Statement:

Please see attached image
with distance between planets as 4x10^8m measured by you on the ship
Relevant Equations:
 t' = γ(t  ux/c^2)
with distance between planets as 4x10^8m measured by you on the ship
My attempt:
t' = γ(t  ux/c^2)
γ = 5/3
u = 0.8c
t = 0.9s
x = 4x10^8m
answer is: 0.278
Therefore not possible
My question is what if we travelled rightwards, from p2 to p1, would the answer change?
Should my above information make u = 0.8c instead of +?
Thank you
My attempt:
t' = γ(t  ux/c^2)
γ = 5/3
u = 0.8c
t = 0.9s
x = 4x10^8m
answer is: 0.278
Therefore not possible
My question is what if we travelled rightwards, from p2 to p1, would the answer change?
Should my above information make u = 0.8c instead of +?
Thank you