The man stands on a turntable that rotates about a vertical axis with a constant angular...

The man stands on a turntable that rotates about a vertical axis with a constant angular velocity of If lie tilts his head forward at a constant angular velocity of about point O, determine the magnitude of the moment that must be resisted by his neck at O at the instant θ = 30°. Assume that his head can be considered as a uniform 10-lb sphere, having a radius of 4.5 in. and center of gravity located at G, and point O is on the surface of the sphere.