The illustrated T-bar is positioned by the two linksADandBE. At the illustrated instant,rA/D=2Lb^2,rB/E=Lb^2,θ˙=2.75rad/s andθ¨=0. Determine thek^-component of the angular acceleration of T-barABCifL=1.8 mandϕ=63degrees. Specify your answer in rad/s2to 2 decimal places.
