Q$11.$ A moment M is being applied to a disc, resting on a horizontal floor, in the

counterclockwise direction as shown in figure Q$11,$ with the aim of moving the right$-$angled

triangular block, that is wedged between a vertical wall and the disc, in the upward direction.

Given that the weight $W_A$ of the triangular block is $20N,$ the angle $q$ is $37,$ the weight $W_B$ of

the disc is $100$ N $,$ the radius $r$ of the disc is $1$ m $,$ and coefficient of friction between all

contacting surfaces is $0\mathrm{.}2,$ find out whether the wedge will actually start to move upwards or

stay in place with the disc spinning. What is the value of the moment at which this motion will

impend?

$[15$ marks$]$