Problem $4$

Complete $3\mathrm{.}31$ from the course text.

$3/31$ Determine the minimum cylinder mass $m_1$ required

to cause loss of contact at $A.$

Hint:

There are two free body diagrams involved here:

The pulley system with two cables above and the mass below.

The right$-$angle uniform slender bar AOB.

The pulley system FBD informs the uniform slender bar FBD$.$

Loss of contact means there is no reaction force at A$.$