Determine the rate of change H A of the angular momentum HA of the assembly of the plate of Prob. 18.3, assuming that it has an angular velocity ω = ω and an angular acceleration α = αj
Prob. 18.3 A thin homogeneous square of mass m and side a is welded to a vertical shaft AB with which it forms an angle of 45°. Knowing that the shaft rotates with an angular velocity ω, determine the angular momentum of the plate about A.
