An experimental Fresnel-lens solar-energy concentrator can rotate about the horizontal axi...

An experimental Fresnel-lens solar-energy concentrator can rotate about the horizontal axis AB which passes through its mass center G. It is supported at A and B by a steel frarmework which can rotate about the vertical y axis. The concentrator has a mass of 30 Mg. a radius of gyration of 12 m about its axis of symmetry CD, and a radius of gyration of 10 m about and transverse axis through G. Knowing that the angular velocity ω1 and ω2 have constant magnitudes equal to 0.20 rad/s and 0.25 rad/s. respectively, determine for the position θ= 60° (a) the forces exerted on the concentrator at A and B, (b) the couple M2k applied to the concentrator at that instant.