A cord is wound about a uniform disk which is free to rotate about its center. The radius of the disk is 15cm. Its mass is around 3.5kg and a 5kg mass is joined to the cord and the system is free from rest.
i) Determine the angular acceleration of the disk.
ii) In 5 second, determine the angular velocity of the disk.
iii) After 5 second, determine the net angular displacement of the disk