BITSAT 2016 Solved Question Paper

µAW=‌‌

2

3

;µBW=‌‌

1

3

Diagram shows the various forces acting on the masses and their resolution in the direction of motion. Let us consider the two masses to be a system. The forces trying to move the system such that A moves upwards and B moves downwards
=‌‌

2mg

√2

−‌‌

mg

√2

=‌‌

mg

√2

The forces trying to stop this motion (i.e., maximum frictional force)
=fA+fB=µANA+µBNB
Since the stopping force is more therefore the mass system will not move
⇒ acceleration of the system is zero.