[seamen]

On OCR m1 paper june 2007 stuck on question 5 iii , I thought when one block is moving down which is Q the acceleration is positive 9.8 and when going up acceleration is negative 9.8 for P put this into the equation I got something totally wrong compared to the mark scheme if anyone can explain this to me I would be very grateful, I am super confused and I got my exam in 2 days.

[Coursework.info]

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