A simple question about non-inertial Frames of Reference

[Singalo]

Hello
Is it even possible to have an answer for D given condition #4 ?
i need help in just for question D, and not everything else . Thanks :]

The Attempt at a Solution

Because Either S or S' Could be accelerating, and depending on which one and how much is accelerating, there will be different answers for D. Everything else is working out for me up until condition 4 which is giving me trouble answering D.

 

[Orodruin]

2 seems to suggest that this is always the particle velocity in S’, since 3 mentions ”initially”.

 

[Singalo]

2 seems to suggest that this is always the particle velocity in S’, since 3 mentions ”initially”.

ahh! i did not notice that. if that's the case then S would definitely be the only one accelerating. Its answerable now. I assumed both of them were initial velocities since these conditions were observed at t=0. Would have helped if condition #2 specifically said that the velocity would not change relative to S'..

If somehow it weren't the case, D cannot be answered right? (just tried out, C would also be unanswerable since yet again, either frame could be accelerating)