3.22 An anemometer consists of four metal bowls, each with mass m, which are mounted on rods with length b = 3r. The metal bowls can be said to be hemispherical shells with radius r. Each rod, which also has the mass m, has a direction which coincides with the diameter of the hemispherical shell. At one point, the angular velocity is w. Determine the systems. a) kinetic energy b) momentum with respect to the axis of rotation. 118 236 The answaer of the question is: a) () mr?w?; b) mr2w? 3