Problem $3$: Deflection Calculation $($Virtual work method$)$

Determine slope at A and vertical deflection at point D of the beam loaded as shown in Figure $3$ below

using virtual work method. The cross session of the beam is constant throughout its length and

moment of inertia is $150$ x $106$ mm$4.$ A is a roller support, and C is a fixed. There is an internal pin $($hinge$)$

at point B$.$ Take E $=200$ Gpa.