Collars A and $B$ are connected by a $2\mathrm{.}8$ m long wire and can slide freely on frictionless rods. If a force $P=(660N)j$ is applied

at $A,$ determine:

$($a$)$ the tension in the wire when $x=400mm$ and $y=200mm,$

$($b$)$ the magnitude of the force $Q$ required to maintain the equilibrium of the system.

Hint Draw the FBD of each collar separately.

$T(wire)=kN$

$Q=kN$