A solid rectangular parallelepiped of mass m has a square base

A solid rectangular parallelepiped of mass m has a square base of side a and a length 2a. Knowing that it rotates at the constant rate ω about its diagonal AC′ and that its rotation is observed from A as counterclockwise, determine
(a) The magnitude of the angular momentum HG of the parallelepiped about its mass center G,
(b) The angle that HG forms with the diagonal AC'.




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