What is the minimum acceleration with which bar A should be

Last updated: 6/4/2023

What is the minimum acceleration with which bar A should be shifted horizontally to keep the bodies 1 and 2 stationary relative to the bar The masses of the bodies are equal and the coefficient of friction between the bar and the bodies equal to u The masses of the pulley and the threads are negligible while the friction in the pulley is absent see in fig A 2