For the assembly of Prob. 18.15, determine

(a) The angular momentum HB of the assembly about point B,

(b) The angle formed by HB and BA. Problem 18.15: Two L-shaped arms, each of mass 5 kg, are welded at the one-third points of the 600 mm shaft AB to form the assembly shown. Knowing that the assembly rotates at the constant rate of 360 rpm, determine

(a) The angular momentum HA of the assembly about point A,

(b) The angle formed by HA and AB.

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