A 120-kg satellite has a radius of gyration of 600 mm with respect to the y axis and is sy...

A 120-kg satellite has a radius of gyration of 600 mm with respect to the y axis and is symmetrical with respect to the zx plane. Its orientation is changed by firing four small rockets A, B,C, and D, each of which produces a 16.20-N thrust T directed as shown. Determine the angular acceleration of the satellite and the acceleration of its mass center G (a) when all four rockets are fired, (b) when all rockets except D are fired.