Einstein relativity between 2 coordinates systems

AI Thread Summary
The discussion revolves around calculating the speed of a moving coordinate system using the Lorentz transformation. The user initially calculated a speed of V' = 1.2 m/s but needs to find a solution of -1.2 m/s. It is clarified that the standard transformation is from the unprimed frame to the primed frame, but the user should apply the inverse transformation since the data provided is in the primed frame. This adjustment is essential to accurately determine the speed at which the two events occur at the same point in the unprimed frame. Understanding the correct application of the Lorentz transformation is crucial for solving the problem.
Atabold
Messages
2
Reaction score
0
Homework Statement
Two coordinate events (24 s, 12 m) and (35 s, 25 m) occur on the x' axis of the system S'. At what speed must S' translate in order for the two events occur at the same point for S?
What is the x coordinate of this point?
Relevant Equations
V' = ( x'f — x'i ) / ( t'f — t'i )
I calculated the speed using the information provided through the above equation and finding V' = 1.2 m/s.

However, the first solution must be -1,2 m/s. I don't know how to reach it, any suggestion?
 
Physics news on Phys.org
Atabold said:
Homework Statement: Two coordinate events (24 s, 12 m) and (35 s, 25 m) occur on the x' axis of the system S'. At what speed must S' translate in order for the two events occur at the same point for S?
What is the x coordinate of this point?
Relevant Equations: V' = ( x'f — x'i ) / ( t'f — t'i )

I calculated the speed using the information provided through the above equation and finding V' = 1.2 m/s.

However, the first solution must be -1,2 m/s. I don't know how to reach it, any suggestion?
Are you doing the standard, conventional transformation or the inverse? Which should it be?
 
PeroK said:
Are you doing the standard, conventional transformation or the inverse? Which should it be?
I have done the Lorentz transformation
 
Atabold said:
I have done the Lorentz transformation
The usual convention for the LT is to transform from the unprimed frame to the primed frame. You need the inverse transformation here, as you have data in the primed frame.
 
Thread 'Voltmeter readings for this circuit with switches'
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
Thread 'Correct statement about a reservoir with an outlet pipe'
The answer to this question is statements (ii) and (iv) are correct. (i) This is FALSE because the speed of water in the tap is greater than speed at the water surface (ii) I don't even understand this statement. What does the "seal" part have to do with water flowing out? Won't the water still flow out through the tap until the tank is empty whether the reservoir is sealed or not? (iii) In my opinion, this statement would be correct. Increasing the gravitational potential energy of the...
Back
Top