Figure shows a 1000-kg mass being lowered by a cable at a uniform rate of 4 m/s from a drum of 550-mm-diameter weighing 2.5 kN and having a 250-mm-radius of gyration.(a) What is the kinetic energy in the system?(b) The uniform rate of descent is maintained by a brake on the drum which applies a torque of 2698 N⋅m. What additional brake torque is required to bring the system to rest in 0.60 s?<image 1>
['9673J,2218N⋅m', '5723J,1218N⋅m', '9673J,1218N⋅m', '5723J,2218N⋅m']