An anemometer for measuring wind speed consists of four metal cups, each of mass m = 140 g, mounted on the ends of four essentially massless rods of length R= 0.37 m. The rods are at right angles to each other and the structure rigidly rotates at f = 12 rev/s. Treat the cups as point masses.
1) What is the moment of inertia of the anemometer about the axis of rotation?
2)What is the angular momentum of the anemometer about the rotation axis?