• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Special relativity velocity and spaceships!

  • Thread starter shyguy79
  • Start date
102
0
1. Homework Statement

---------> A. B <----------
v. v
------------------------------------ this is static frame of ref (D) the space station

Where v=0.97c

In the static frame of reference, ship A has the same length as ship B and are travelling towards eachother. Calculate the speed of ship A relative to ship B according to an observer on the space station. Express your answer as a multiple of vA.

Use your answer as part of a short argument to show that the time required for the whole of ship A to pass through the whole of ship B is ΔtA, as observed from the space station.

2. Homework Equations
v'= u - v / 1-vu/c^2

3. The Attempt at a Solution
I think that v' = 0.97c - (-0.97c) / 1 - 0.97c*-0.97c/c^2 because they are travelling towards eachother and comes out approximately as 2.9995e8 ms^-1... Or am I barking up the wrong tree and how would you express as a multiple of vA?

How would I work out the 2nd part though... I'm stumped?

Help much appreciated... Thanks for reading
 

Want to reply to this thread?

"Special relativity velocity and spaceships!" You must log in or register to reply here.

Related Threads for: Special relativity velocity and spaceships!

  • Posted
Replies
5
Views
1K
  • Posted
Replies
0
Views
851
  • Posted
Replies
4
Views
540
  • Posted
Replies
1
Views
865
Replies
3
Views
1K
Replies
1
Views
540
Replies
9
Views
492
Replies
1
Views
2K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top