The passengers, the gondola, and its swing frame have a total mass of 50 Mg, a mass cent...

The passengers, the gondola, and its swing frame have a total mass of 50 Mg, a mass center at G, and a radius of gyration k_B = 3.5 m. Additionally, the 3-Mg steel block at A can be considered as a point of concentrated mass. Determine the horizontal and vertical components of reaction at pin B if the gondola swings freely at ω = 1 rad/s when it reaches its lowest point as shown. Also, what is the gondola's angular acceleration at this instant?