The 2-kg ball rotates around a 0.5-m-diameter circular path with a constant speed. If th...

The 2-kg ball rotates around a 0.5-m-diameter circular path with a constant speed. If the cord length is shortened from 1 = 1 m to l' = 0.5 m, by pulling the cord through the tube, determine the new diameter of the path d'. Also, what is the tension in the cord in each case?