The man is walking with speed v1 = 1.2 m/s to the right when he trips over a small floor discontinuity. Estimate his angular velocity ω just after the impact. His mass is 76 kg with center-of-mass height h = 0.87 m, and his mass moment of inertia about the ankle joint O is 66 kg ∙ m², where all are properties of the portion of his body above O; i.e., both the mass and moment of  inertia do not include the foot.