Assume these poor souls are supported by a 1000 lb steel rod

Assume these poor souls are supported by a 1000 lb steel rod about 25feet long. Assuming 24 riders (I counted feet) at 100lb each and a 200lb steel carriage. Make appropriate estimates of dimensions from the photo as necessary. The arm was swinging upwards and has stopped at an elevation of 60 degrees with respect to the horizontal before descending. At this instant, determine the reaction forces at the base of the arm and the acceleration of the riders.

Solution

reaction force at the base of the arm will be

200 * 100 = 20,000