Block tied to a fixed string on an accelerating wedge

[kuruman]

I think you made a mistake. The acceleration of block w.r.t to ground is 2acosα/2.

You are correct. I looked at the wrong equation. I will fix the error.

 

[Null_Void]

You are correct. I will fix the error.

Nevertheless, a huge Thank you for your time!

 

[kuruman]

Nevertheless, a huge Thank you for your time!

Error fixed. Thank you for spotting it.